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 @ignore  @c The GNU General Public License.
 @c Set file name and title for man page.  @center Version 3, 29 June 2007
 @setfilename gpl  
 @settitle GNU General Public License  @c This file is intended to be included within another document,
 @c man begin SEEALSO  @c hence no sectioning command or @node.
 gfdl(7), fsf-funding(7).  
 @c man end  
 @c man begin COPYRIGHT  
 Copyright @copyright{} 1989, 1991 Free Software Foundation, Inc.  
 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA  
   
 Everyone is permitted to copy and distribute verbatim copies  
 of this license document, but changing it is not allowed.  
 @c man end  
 @end ignore  
 @node Copying  
 @c man begin DESCRIPTION  
 @appendixsec GNU GENERAL PUBLIC LICENSE  
 @center Version 2, June 1991  
   
 @display  @display
 Copyright @copyright{} 1989, 1991 Free Software Foundation, Inc.  Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/}
 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA  
   
 Everyone is permitted to copy and distribute verbatim copies  Everyone is permitted to copy and distribute verbatim copies of this
 of this license document, but changing it is not allowed.  license document, but changing it is not allowed.
 @end display  @end display
   
 @unnumberedsec Preamble  @heading Preamble
   
   The GNU General Public License is a free, copyleft license for
   software and other kinds of works.
   
   The licenses for most software are designed to take away your  The licenses for most software and other practical works are designed
 freedom to share and change it.  By contrast, the GNU General Public  to take away your freedom to share and change the works.  By contrast,
 License is intended to guarantee your freedom to share and change free  the GNU General Public License is intended to guarantee your freedom
 software---to make sure the software is free for all its users.  This  to share and change all versions of a program---to make sure it remains
 General Public License applies to most of the Free Software  free software for all its users.  We, the Free Software Foundation,
 Foundation's software and to any other program whose authors commit to  use the GNU General Public License for most of our software; it
 using it.  (Some other Free Software Foundation software is covered by  applies also to any other work released this way by its authors.  You
 the GNU Library General Public License instead.)  You can apply it to  can apply it to your programs, too.
 your programs, too.  
   
   When we speak of free software, we are referring to freedom, not  When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you  price.  Our General Public Licenses are designed to make sure that you
 have the freedom to distribute copies of free software (and charge for  have the freedom to distribute copies of free software (and charge for
 this service if you wish), that you receive source code or can get it  them if you wish), that you receive source code or can get it if you
 if you want it, that you can change the software or use pieces of it  want it, that you can change the software or use pieces of it in new
 in new free programs; and that you know you can do these things.  free programs, and that you know you can do these things.
   
   To protect your rights, we need to make restrictions that forbid  To protect your rights, we need to prevent others from denying you
 anyone to deny you these rights or to ask you to surrender the rights.  these rights or asking you to surrender the rights.  Therefore, you
 These restrictions translate to certain responsibilities for you if you  have certain responsibilities if you distribute copies of the
 distribute copies of the software, or if you modify it.  software, or if you modify it: responsibilities to respect the freedom
   of others.
   For example, if you distribute copies of such a program, whether  
 gratis or for a fee, you must give the recipients all the rights that  For example, if you distribute copies of such a program, whether
 you have.  You must make sure that they, too, receive or can get the  gratis or for a fee, you must pass on to the recipients the same
 source code.  And you must show them these terms so they know their  freedoms that you received.  You must make sure that they, too,
 rights.  receive or can get the source code.  And you must show them these
   terms so they know their rights.
   We protect your rights with two steps: (1) copyright the software, and  
 (2) offer you this license which gives you legal permission to copy,  Developers that use the GNU GPL protect your rights with two steps:
 distribute and/or modify the software.  (1) assert copyright on the software, and (2) offer you this License
   giving you legal permission to copy, distribute and/or modify it.
   Also, for each author's protection and ours, we want to make certain  
 that everyone understands that there is no warranty for this free  For the developers' and authors' protection, the GPL clearly explains
 software.  If the software is modified by someone else and passed on, we  that there is no warranty for this free software.  For both users' and
 want its recipients to know that what they have is not the original, so  authors' sake, the GPL requires that modified versions be marked as
 that any problems introduced by others will not reflect on the original  changed, so that their problems will not be attributed erroneously to
 authors' reputations.  authors of previous versions.
   
   Finally, any free program is threatened constantly by software  Some devices are designed to deny users access to install or run
 patents.  We wish to avoid the danger that redistributors of a free  modified versions of the software inside them, although the
 program will individually obtain patent licenses, in effect making the  manufacturer can do so.  This is fundamentally incompatible with the
 program proprietary.  To prevent this, we have made it clear that any  aim of protecting users' freedom to change the software.  The
 patent must be licensed for everyone's free use or not licensed at all.  systematic pattern of such abuse occurs in the area of products for
   individuals to use, which is precisely where it is most unacceptable.
   Therefore, we have designed this version of the GPL to prohibit the
   practice for those products.  If such problems arise substantially in
   other domains, we stand ready to extend this provision to those
   domains in future versions of the GPL, as needed to protect the
   freedom of users.
   
   Finally, every program is threatened constantly by software patents.
   States should not allow patents to restrict development and use of
   software on general-purpose computers, but in those that do, we wish
   to avoid the special danger that patents applied to a free program
   could make it effectively proprietary.  To prevent this, the GPL
   assures that patents cannot be used to render the program non-free.
   
   The precise terms and conditions for copying, distribution and  The precise terms and conditions for copying, distribution and
 modification follow.  modification follow.
   
 @iftex  @heading TERMS AND CONDITIONS
 @unnumberedsec TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION  
 @end iftex  
 @ifnottex  
 @center TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION  
 @end ifnottex  
   
 @enumerate 0  @enumerate 0
 @item  @item Definitions.
 This License applies to any program or other work which contains  
 a notice placed by the copyright holder saying it may be distributed  ``This License'' refers to version 3 of the GNU General Public License.
 under the terms of this General Public License.  The ``Program'', below,  
 refers to any such program or work, and a ``work based on the Program''  ``Copyright'' also means copyright-like laws that apply to other kinds
 means either the Program or any derivative work under copyright law:  of works, such as semiconductor masks.
 that is to say, a work containing the Program or a portion of it,  
 either verbatim or with modifications and/or translated into another  ``The Program'' refers to any copyrightable work licensed under this
 language.  (Hereinafter, translation is included without limitation in  License.  Each licensee is addressed as ``you''.  ``Licensees'' and
 the term ``modification''.)  Each licensee is addressed as ``you''.  ``recipients'' may be individuals or organizations.
   
 Activities other than copying, distribution and modification are not  To ``modify'' a work means to copy from or adapt all or part of the work
 covered by this License; they are outside its scope.  The act of  in a fashion requiring copyright permission, other than the making of
 running the Program is not restricted, and the output from the Program  an exact copy.  The resulting work is called a ``modified version'' of
 is covered only if its contents constitute a work based on the  the earlier work or a work ``based on'' the earlier work.
 Program (independent of having been made by running the Program).  
 Whether that is true depends on what the Program does.  A ``covered work'' means either the unmodified Program or a work based
   on the Program.
 @item  
 You may copy and distribute verbatim copies of the Program's  To ``propagate'' a work means to do anything with it that, without
 source code as you receive it, in any medium, provided that you  permission, would make you directly or secondarily liable for
 conspicuously and appropriately publish on each copy an appropriate  infringement under applicable copyright law, except executing it on a
 copyright notice and disclaimer of warranty; keep intact all the  computer or modifying a private copy.  Propagation includes copying,
 notices that refer to this License and to the absence of any warranty;  distribution (with or without modification), making available to the
 and give any other recipients of the Program a copy of this License  public, and in some countries other activities as well.
 along with the Program.  
   To ``convey'' a work means any kind of propagation that enables other
 You may charge a fee for the physical act of transferring a copy, and  parties to make or receive copies.  Mere interaction with a user
 you may at your option offer warranty protection in exchange for a fee.  through a computer network, with no transfer of a copy, is not
   conveying.
 @item  
 You may modify your copy or copies of the Program or any portion  An interactive user interface displays ``Appropriate Legal Notices'' to
 of it, thus forming a work based on the Program, and copy and  the extent that it includes a convenient and prominently visible
 distribute such modifications or work under the terms of Section 1  feature that (1) displays an appropriate copyright notice, and (2)
 above, provided that you also meet all of these conditions:  tells the user that there is no warranty for the work (except to the
   extent that warranties are provided), that licensees may convey the
   work under this License, and how to view a copy of this License.  If
   the interface presents a list of user commands or options, such as a
   menu, a prominent item in the list meets this criterion.
   
   @item Source Code.
   
   The ``source code'' for a work means the preferred form of the work for
   making modifications to it.  ``Object code'' means any non-source form
   of a work.
   
   A ``Standard Interface'' means an interface that either is an official
   standard defined by a recognized standards body, or, in the case of
   interfaces specified for a particular programming language, one that
   is widely used among developers working in that language.
   
   The ``System Libraries'' of an executable work include anything, other
   than the work as a whole, that (a) is included in the normal form of
   packaging a Major Component, but which is not part of that Major
   Component, and (b) serves only to enable use of the work with that
   Major Component, or to implement a Standard Interface for which an
   implementation is available to the public in source code form.  A
   ``Major Component'', in this context, means a major essential component
   (kernel, window system, and so on) of the specific operating system
   (if any) on which the executable work runs, or a compiler used to
   produce the work, or an object code interpreter used to run it.
   
   The ``Corresponding Source'' for a work in object code form means all
   the source code needed to generate, install, and (for an executable
   work) run the object code and to modify the work, including scripts to
   control those activities.  However, it does not include the work's
   System Libraries, or general-purpose tools or generally available free
   programs which are used unmodified in performing those activities but
   which are not part of the work.  For example, Corresponding Source
   includes interface definition files associated with source files for
   the work, and the source code for shared libraries and dynamically
   linked subprograms that the work is specifically designed to require,
   such as by intimate data communication or control flow between those
   subprograms and other parts of the work.
   
   The Corresponding Source need not include anything that users can
   regenerate automatically from other parts of the Corresponding Source.
   
   The Corresponding Source for a work in source code form is that same
   work.
   
   @item Basic Permissions.
   
   All rights granted under this License are granted for the term of
   copyright on the Program, and are irrevocable provided the stated
   conditions are met.  This License explicitly affirms your unlimited
   permission to run the unmodified Program.  The output from running a
   covered work is covered by this License only if the output, given its
   content, constitutes a covered work.  This License acknowledges your
   rights of fair use or other equivalent, as provided by copyright law.
   
   You may make, run and propagate covered works that you do not convey,
   without conditions so long as your license otherwise remains in force.
   You may convey covered works to others for the sole purpose of having
   them make modifications exclusively for you, or provide you with
   facilities for running those works, provided that you comply with the
   terms of this License in conveying all material for which you do not
   control copyright.  Those thus making or running the covered works for
   you must do so exclusively on your behalf, under your direction and
   control, on terms that prohibit them from making any copies of your
   copyrighted material outside their relationship with you.
   
   Conveying under any other circumstances is permitted solely under the
   conditions stated below.  Sublicensing is not allowed; section 10
   makes it unnecessary.
   
   @item Protecting Users' Legal Rights From Anti-Circumvention Law.
   
   No covered work shall be deemed part of an effective technological
   measure under any applicable law fulfilling obligations under article
   11 of the WIPO copyright treaty adopted on 20 December 1996, or
   similar laws prohibiting or restricting circumvention of such
   measures.
   
   When you convey a covered work, you waive any legal power to forbid
   circumvention of technological measures to the extent such
   circumvention is effected by exercising rights under this License with
   respect to the covered work, and you disclaim any intention to limit
   operation or modification of the work as a means of enforcing, against
   the work's users, your or third parties' legal rights to forbid
   circumvention of technological measures.
   
   @item Conveying Verbatim Copies.
   
   You may convey verbatim copies of the Program's source code as you
   receive it, in any medium, provided that you conspicuously and
   appropriately publish on each copy an appropriate copyright notice;
   keep intact all notices stating that this License and any
   non-permissive terms added in accord with section 7 apply to the code;
   keep intact all notices of the absence of any warranty; and give all
   recipients a copy of this License along with the Program.
   
   You may charge any price or no price for each copy that you convey,
   and you may offer support or warranty protection for a fee.
   
   @item Conveying Modified Source Versions.
   
   You may convey a work based on the Program, or the modifications to
   produce it from the Program, in the form of source code under the
   terms of section 4, provided that you also meet all of these
   conditions:
   
 @enumerate a  @enumerate a
 @item  @item
 You must cause the modified files to carry prominent notices  The work must carry prominent notices stating that you modified it,
 stating that you changed the files and the date of any change.  and giving a relevant date.
   
   @item
   The work must carry prominent notices stating that it is released
   under this License and any conditions added under section 7.  This
   requirement modifies the requirement in section 4 to ``keep intact all
   notices''.
   
   @item
   You must license the entire work, as a whole, under this License to
   anyone who comes into possession of a copy.  This License will
   therefore apply, along with any applicable section 7 additional terms,
   to the whole of the work, and all its parts, regardless of how they
   are packaged.  This License gives no permission to license the work in
   any other way, but it does not invalidate such permission if you have
   separately received it.
   
 @item  @item
 You must cause any work that you distribute or publish, that in  If the work has interactive user interfaces, each must display
 whole or in part contains or is derived from the Program or any  Appropriate Legal Notices; however, if the Program has interactive
 part thereof, to be licensed as a whole at no charge to all third  interfaces that do not display Appropriate Legal Notices, your work
 parties under the terms of this License.  need not make them do so.
   
 @item  
 If the modified program normally reads commands interactively  
 when run, you must cause it, when started running for such  
 interactive use in the most ordinary way, to print or display an  
 announcement including an appropriate copyright notice and a  
 notice that there is no warranty (or else, saying that you provide  
 a warranty) and that users may redistribute the program under  
 these conditions, and telling the user how to view a copy of this  
 License.  (Exception: if the Program itself is interactive but  
 does not normally print such an announcement, your work based on  
 the Program is not required to print an announcement.)  
 @end enumerate  @end enumerate
   
 These requirements apply to the modified work as a whole.  If  A compilation of a covered work with other separate and independent
 identifiable sections of that work are not derived from the Program,  works, which are not by their nature extensions of the covered work,
 and can be reasonably considered independent and separate works in  and which are not combined with it such as to form a larger program,
 themselves, then this License, and its terms, do not apply to those  in or on a volume of a storage or distribution medium, is called an
 sections when you distribute them as separate works.  But when you  ``aggregate'' if the compilation and its resulting copyright are not
 distribute the same sections as part of a whole which is a work based  used to limit the access or legal rights of the compilation's users
 on the Program, the distribution of the whole must be on the terms of  beyond what the individual works permit.  Inclusion of a covered work
 this License, whose permissions for other licensees extend to the  in an aggregate does not cause this License to apply to the other
 entire whole, and thus to each and every part regardless of who wrote it.  parts of the aggregate.
   
 Thus, it is not the intent of this section to claim rights or contest  @item  Conveying Non-Source Forms.
 your rights to work written entirely by you; rather, the intent is to  
 exercise the right to control the distribution of derivative or  You may convey a covered work in object code form under the terms of
 collective works based on the Program.  sections 4 and 5, provided that you also convey the machine-readable
   Corresponding Source under the terms of this License, in one of these
 In addition, mere aggregation of another work not based on the Program  ways:
 with the Program (or with a work based on the Program) on a volume of  
 a storage or distribution medium does not bring the other work under  
 the scope of this License.  
   
 @item  
 You may copy and distribute the Program (or a work based on it,  
 under Section 2) in object code or executable form under the terms of  
 Sections 1 and 2 above provided that you also do one of the following:  
   
 @enumerate a  @enumerate a
 @item  @item
 Accompany it with the complete corresponding machine-readable  Convey the object code in, or embodied in, a physical product
 source code, which must be distributed under the terms of Sections  (including a physical distribution medium), accompanied by the
 1 and 2 above on a medium customarily used for software interchange; or,  Corresponding Source fixed on a durable physical medium customarily
   used for software interchange.
 @item  
 Accompany it with a written offer, valid for at least three  @item
 years, to give any third party, for a charge no more than your  Convey the object code in, or embodied in, a physical product
 cost of physically performing source distribution, a complete  (including a physical distribution medium), accompanied by a written
 machine-readable copy of the corresponding source code, to be  offer, valid for at least three years and valid for as long as you
 distributed under the terms of Sections 1 and 2 above on a medium  offer spare parts or customer support for that product model, to give
 customarily used for software interchange; or,  anyone who possesses the object code either (1) a copy of the
   Corresponding Source for all the software in the product that is
 @item  covered by this License, on a durable physical medium customarily used
 Accompany it with the information you received as to the offer  for software interchange, for a price no more than your reasonable
 to distribute corresponding source code.  (This alternative is  cost of physically performing this conveying of source, or (2) access
 allowed only for noncommercial distribution and only if you  to copy the Corresponding Source from a network server at no charge.
 received the program in object code or executable form with such  
 an offer, in accord with Subsection b above.)  @item
   Convey individual copies of the object code with a copy of the written
   offer to provide the Corresponding Source.  This alternative is
   allowed only occasionally and noncommercially, and only if you
   received the object code with such an offer, in accord with subsection
   6b.
   
   @item
   Convey the object code by offering access from a designated place
   (gratis or for a charge), and offer equivalent access to the
   Corresponding Source in the same way through the same place at no
   further charge.  You need not require recipients to copy the
   Corresponding Source along with the object code.  If the place to copy
   the object code is a network server, the Corresponding Source may be
   on a different server (operated by you or a third party) that supports
   equivalent copying facilities, provided you maintain clear directions
   next to the object code saying where to find the Corresponding Source.
   Regardless of what server hosts the Corresponding Source, you remain
   obligated to ensure that it is available for as long as needed to
   satisfy these requirements.
   
   @item
   Convey the object code using peer-to-peer transmission, provided you
   inform other peers where the object code and Corresponding Source of
   the work are being offered to the general public at no charge under
   subsection 6d.
   
 @end enumerate  @end enumerate
   
 The source code for a work means the preferred form of the work for  A separable portion of the object code, whose source code is excluded
 making modifications to it.  For an executable work, complete source  from the Corresponding Source as a System Library, need not be
 code means all the source code for all modules it contains, plus any  included in conveying the object code work.
 associated interface definition files, plus the scripts used to  
 control compilation and installation of the executable.  However, as a  A ``User Product'' is either (1) a ``consumer product'', which means any
 special exception, the source code distributed need not include  tangible personal property which is normally used for personal,
 anything that is normally distributed (in either source or binary  family, or household purposes, or (2) anything designed or sold for
 form) with the major components (compiler, kernel, and so on) of the  incorporation into a dwelling.  In determining whether a product is a
 operating system on which the executable runs, unless that component  consumer product, doubtful cases shall be resolved in favor of
 itself accompanies the executable.  coverage.  For a particular product received by a particular user,
   ``normally used'' refers to a typical or common use of that class of
 If distribution of executable or object code is made by offering  product, regardless of the status of the particular user or of the way
 access to copy from a designated place, then offering equivalent  in which the particular user actually uses, or expects or is expected
 access to copy the source code from the same place counts as  to use, the product.  A product is a consumer product regardless of
 distribution of the source code, even though third parties are not  whether the product has substantial commercial, industrial or
 compelled to copy the source along with the object code.  non-consumer uses, unless such uses represent the only significant
   mode of use of the product.
 @item  
 You may not copy, modify, sublicense, or distribute the Program  ``Installation Information'' for a User Product means any methods,
 except as expressly provided under this License.  Any attempt  procedures, authorization keys, or other information required to
 otherwise to copy, modify, sublicense or distribute the Program is  install and execute modified versions of a covered work in that User
 void, and will automatically terminate your rights under this License.  Product from a modified version of its Corresponding Source.  The
 However, parties who have received copies, or rights, from you under  information must suffice to ensure that the continued functioning of
 this License will not have their licenses terminated so long as such  the modified object code is in no case prevented or interfered with
 parties remain in full compliance.  solely because modification has been made.
   
 @item  If you convey an object code work under this section in, or with, or
 You are not required to accept this License, since you have not  specifically for use in, a User Product, and the conveying occurs as
 signed it.  However, nothing else grants you permission to modify or  part of a transaction in which the right of possession and use of the
 distribute the Program or its derivative works.  These actions are  User Product is transferred to the recipient in perpetuity or for a
 prohibited by law if you do not accept this License.  Therefore, by  fixed term (regardless of how the transaction is characterized), the
 modifying or distributing the Program (or any work based on the  Corresponding Source conveyed under this section must be accompanied
 Program), you indicate your acceptance of this License to do so, and  by the Installation Information.  But this requirement does not apply
 all its terms and conditions for copying, distributing or modifying  if neither you nor any third party retains the ability to install
 the Program or works based on it.  modified object code on the User Product (for example, the work has
   been installed in ROM).
 @item  
 Each time you redistribute the Program (or any work based on the  The requirement to provide Installation Information does not include a
 Program), the recipient automatically receives a license from the  requirement to continue to provide support service, warranty, or
 original licensor to copy, distribute or modify the Program subject to  updates for a work that has been modified or installed by the
 these terms and conditions.  You may not impose any further  recipient, or for the User Product in which it has been modified or
 restrictions on the recipients' exercise of the rights granted herein.  installed.  Access to a network may be denied when the modification
 You are not responsible for enforcing compliance by third parties to  itself materially and adversely affects the operation of the network
 this License.  or violates the rules and protocols for communication across the
   network.
   
   Corresponding Source conveyed, and Installation Information provided,
   in accord with this section must be in a format that is publicly
   documented (and with an implementation available to the public in
   source code form), and must require no special password or key for
   unpacking, reading or copying.
   
   @item Additional Terms.
   
   ``Additional permissions'' are terms that supplement the terms of this
   License by making exceptions from one or more of its conditions.
   Additional permissions that are applicable to the entire Program shall
   be treated as though they were included in this License, to the extent
   that they are valid under applicable law.  If additional permissions
   apply only to part of the Program, that part may be used separately
   under those permissions, but the entire Program remains governed by
   this License without regard to the additional permissions.
   
   When you convey a copy of a covered work, you may at your option
   remove any additional permissions from that copy, or from any part of
   it.  (Additional permissions may be written to require their own
   removal in certain cases when you modify the work.)  You may place
   additional permissions on material, added by you to a covered work,
   for which you have or can give appropriate copyright permission.
   
   Notwithstanding any other provision of this License, for material you
   add to a covered work, you may (if authorized by the copyright holders
   of that material) supplement the terms of this License with terms:
   
   @enumerate a
 @item  @item
 If, as a consequence of a court judgment or allegation of patent  Disclaiming warranty or limiting liability differently from the terms
 infringement or for any other reason (not limited to patent issues),  of sections 15 and 16 of this License; or
 conditions are imposed on you (whether by court order, agreement or  
 otherwise) that contradict the conditions of this License, they do not  @item
 excuse you from the conditions of this License.  If you cannot  Requiring preservation of specified reasonable legal notices or author
 distribute so as to satisfy simultaneously your obligations under this  attributions in that material or in the Appropriate Legal Notices
 License and any other pertinent obligations, then as a consequence you  displayed by works containing it; or
 may not distribute the Program at all.  For example, if a patent  
 license would not permit royalty-free redistribution of the Program by  @item
 all those who receive copies directly or indirectly through you, then  Prohibiting misrepresentation of the origin of that material, or
 the only way you could satisfy both it and this License would be to  requiring that modified versions of such material be marked in
 refrain entirely from distribution of the Program.  reasonable ways as different from the original version; or
   
 If any portion of this section is held invalid or unenforceable under  @item
 any particular circumstance, the balance of the section is intended to  Limiting the use for publicity purposes of names of licensors or
 apply and the section as a whole is intended to apply in other  authors of the material; or
 circumstances.  
   
 It is not the purpose of this section to induce you to infringe any  
 patents or other property right claims or to contest validity of any  
 such claims; this section has the sole purpose of protecting the  
 integrity of the free software distribution system, which is  
 implemented by public license practices.  Many people have made  
 generous contributions to the wide range of software distributed  
 through that system in reliance on consistent application of that  
 system; it is up to the author/donor to decide if he or she is willing  
 to distribute software through any other system and a licensee cannot  
 impose that choice.  
   
 This section is intended to make thoroughly clear what is believed to  
 be a consequence of the rest of this License.  
   
 @item  
 If the distribution and/or use of the Program is restricted in  
 certain countries either by patents or by copyrighted interfaces, the  
 original copyright holder who places the Program under this License  
 may add an explicit geographical distribution limitation excluding  
 those countries, so that distribution is permitted only in or among  
 countries not thus excluded.  In such case, this License incorporates  
 the limitation as if written in the body of this License.  
   
 @item  @item
   Declining to grant rights under trademark law for use of some trade
   names, trademarks, or service marks; or
   
   @item
   Requiring indemnification of licensors and authors of that material by
   anyone who conveys the material (or modified versions of it) with
   contractual assumptions of liability to the recipient, for any
   liability that these contractual assumptions directly impose on those
   licensors and authors.
   @end enumerate
   
   All other non-permissive additional terms are considered ``further
   restrictions'' within the meaning of section 10.  If the Program as you
   received it, or any part of it, contains a notice stating that it is
   governed by this License along with a term that is a further
   restriction, you may remove that term.  If a license document contains
   a further restriction but permits relicensing or conveying under this
   License, you may add to a covered work material governed by the terms
   of that license document, provided that the further restriction does
   not survive such relicensing or conveying.
   
   If you add terms to a covered work in accord with this section, you
   must place, in the relevant source files, a statement of the
   additional terms that apply to those files, or a notice indicating
   where to find the applicable terms.
   
   Additional terms, permissive or non-permissive, may be stated in the
   form of a separately written license, or stated as exceptions; the
   above requirements apply either way.
   
   @item Termination.
   
   You may not propagate or modify a covered work except as expressly
   provided under this License.  Any attempt otherwise to propagate or
   modify it is void, and will automatically terminate your rights under
   this License (including any patent licenses granted under the third
   paragraph of section 11).
   
   However, if you cease all violation of this License, then your license
   from a particular copyright holder is reinstated (a) provisionally,
   unless and until the copyright holder explicitly and finally
   terminates your license, and (b) permanently, if the copyright holder
   fails to notify you of the violation by some reasonable means prior to
   60 days after the cessation.
   
   Moreover, your license from a particular copyright holder is
   reinstated permanently if the copyright holder notifies you of the
   violation by some reasonable means, this is the first time you have
   received notice of violation of this License (for any work) from that
   copyright holder, and you cure the violation prior to 30 days after
   your receipt of the notice.
   
   Termination of your rights under this section does not terminate the
   licenses of parties who have received copies or rights from you under
   this License.  If your rights have been terminated and not permanently
   reinstated, you do not qualify to receive new licenses for the same
   material under section 10.
   
   @item Acceptance Not Required for Having Copies.
   
   You are not required to accept this License in order to receive or run
   a copy of the Program.  Ancillary propagation of a covered work
   occurring solely as a consequence of using peer-to-peer transmission
   to receive a copy likewise does not require acceptance.  However,
   nothing other than this License grants you permission to propagate or
   modify any covered work.  These actions infringe copyright if you do
   not accept this License.  Therefore, by modifying or propagating a
   covered work, you indicate your acceptance of this License to do so.
   
   @item Automatic Licensing of Downstream Recipients.
   
   Each time you convey a covered work, the recipient automatically
   receives a license from the original licensors, to run, modify and
   propagate that work, subject to this License.  You are not responsible
   for enforcing compliance by third parties with this License.
   
   An ``entity transaction'' is a transaction transferring control of an
   organization, or substantially all assets of one, or subdividing an
   organization, or merging organizations.  If propagation of a covered
   work results from an entity transaction, each party to that
   transaction who receives a copy of the work also receives whatever
   licenses to the work the party's predecessor in interest had or could
   give under the previous paragraph, plus a right to possession of the
   Corresponding Source of the work from the predecessor in interest, if
   the predecessor has it or can get it with reasonable efforts.
   
   You may not impose any further restrictions on the exercise of the
   rights granted or affirmed under this License.  For example, you may
   not impose a license fee, royalty, or other charge for exercise of
   rights granted under this License, and you may not initiate litigation
   (including a cross-claim or counterclaim in a lawsuit) alleging that
   any patent claim is infringed by making, using, selling, offering for
   sale, or importing the Program or any portion of it.
   
   @item Patents.
   
   A ``contributor'' is a copyright holder who authorizes use under this
   License of the Program or a work on which the Program is based.  The
   work thus licensed is called the contributor's ``contributor version''.
   
   A contributor's ``essential patent claims'' are all patent claims owned
   or controlled by the contributor, whether already acquired or
   hereafter acquired, that would be infringed by some manner, permitted
   by this License, of making, using, or selling its contributor version,
   but do not include claims that would be infringed only as a
   consequence of further modification of the contributor version.  For
   purposes of this definition, ``control'' includes the right to grant
   patent sublicenses in a manner consistent with the requirements of
   this License.
   
   Each contributor grants you a non-exclusive, worldwide, royalty-free
   patent license under the contributor's essential patent claims, to
   make, use, sell, offer for sale, import and otherwise run, modify and
   propagate the contents of its contributor version.
   
   In the following three paragraphs, a ``patent license'' is any express
   agreement or commitment, however denominated, not to enforce a patent
   (such as an express permission to practice a patent or covenant not to
   sue for patent infringement).  To ``grant'' such a patent license to a
   party means to make such an agreement or commitment not to enforce a
   patent against the party.
   
   If you convey a covered work, knowingly relying on a patent license,
   and the Corresponding Source of the work is not available for anyone
   to copy, free of charge and under the terms of this License, through a
   publicly available network server or other readily accessible means,
   then you must either (1) cause the Corresponding Source to be so
   available, or (2) arrange to deprive yourself of the benefit of the
   patent license for this particular work, or (3) arrange, in a manner
   consistent with the requirements of this License, to extend the patent
   license to downstream recipients.  ``Knowingly relying'' means you have
   actual knowledge that, but for the patent license, your conveying the
   covered work in a country, or your recipient's use of the covered work
   in a country, would infringe one or more identifiable patents in that
   country that you have reason to believe are valid.
   
   If, pursuant to or in connection with a single transaction or
   arrangement, you convey, or propagate by procuring conveyance of, a
   covered work, and grant a patent license to some of the parties
   receiving the covered work authorizing them to use, propagate, modify
   or convey a specific copy of the covered work, then the patent license
   you grant is automatically extended to all recipients of the covered
   work and works based on it.
   
   A patent license is ``discriminatory'' if it does not include within the
   scope of its coverage, prohibits the exercise of, or is conditioned on
   the non-exercise of one or more of the rights that are specifically
   granted under this License.  You may not convey a covered work if you
   are a party to an arrangement with a third party that is in the
   business of distributing software, under which you make payment to the
   third party based on the extent of your activity of conveying the
   work, and under which the third party grants, to any of the parties
   who would receive the covered work from you, a discriminatory patent
   license (a) in connection with copies of the covered work conveyed by
   you (or copies made from those copies), or (b) primarily for and in
   connection with specific products or compilations that contain the
   covered work, unless you entered into that arrangement, or that patent
   license was granted, prior to 28 March 2007.
   
   Nothing in this License shall be construed as excluding or limiting
   any implied license or other defenses to infringement that may
   otherwise be available to you under applicable patent law.
   
   @item No Surrender of Others' Freedom.
   
   If conditions are imposed on you (whether by court order, agreement or
   otherwise) that contradict the conditions of this License, they do not
   excuse you from the conditions of this License.  If you cannot convey
   a covered work so as to satisfy simultaneously your obligations under
   this License and any other pertinent obligations, then as a
   consequence you may not convey it at all.  For example, if you agree
   to terms that obligate you to collect a royalty for further conveying
   from those to whom you convey the Program, the only way you could
   satisfy both those terms and this License would be to refrain entirely
   from conveying the Program.
   
   @item Use with the GNU Affero General Public License.
   
   Notwithstanding any other provision of this License, you have
   permission to link or combine any covered work with a work licensed
   under version 3 of the GNU Affero General Public License into a single
   combined work, and to convey the resulting work.  The terms of this
   License will continue to apply to the part which is the covered work,
   but the special requirements of the GNU Affero General Public License,
   section 13, concerning interaction through a network will apply to the
   combination as such.
   
   @item Revised Versions of this License.
   
 The Free Software Foundation may publish revised and/or new versions  The Free Software Foundation may publish revised and/or new versions
 of the General Public License from time to time.  Such new versions will  of the GNU General Public License from time to time.  Such new
 be similar in spirit to the present version, but may differ in detail to  versions will be similar in spirit to the present version, but may
 address new problems or concerns.  differ in detail to address new problems or concerns.
   
 Each version is given a distinguishing version number.  If the Program  Each version is given a distinguishing version number.  If the Program
 specifies a version number of this License which applies to it and ``any  specifies that a certain numbered version of the GNU General Public
 later version'', you have the option of following the terms and conditions  License ``or any later version'' applies to it, you have the option of
 either of that version or of any later version published by the Free  following the terms and conditions either of that numbered version or
 Software Foundation.  If the Program does not specify a version number of  of any later version published by the Free Software Foundation.  If
 this License, you may choose any version ever published by the Free Software  the Program does not specify a version number of the GNU General
 Foundation.  Public License, you may choose any version ever published by the Free
   Software Foundation.
 @item  
 If you wish to incorporate parts of the Program into other free  If the Program specifies that a proxy can decide which future versions
 programs whose distribution conditions are different, write to the author  of the GNU General Public License can be used, that proxy's public
 to ask for permission.  For software which is copyrighted by the Free  statement of acceptance of a version permanently authorizes you to
 Software Foundation, write to the Free Software Foundation; we sometimes  choose that version for the Program.
 make exceptions for this.  Our decision will be guided by the two goals  
 of preserving the free status of all derivatives of our free software and  Later license versions may give you additional or different
 of promoting the sharing and reuse of software generally.  permissions.  However, no additional obligations are imposed on any
   author or copyright holder as a result of your choosing to follow a
 @iftex  later version.
 @heading NO WARRANTY  
 @end iftex  @item Disclaimer of Warranty.
 @ifnottex  
 @center NO WARRANTY  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
 @end ifnottex  APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
   HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS'' WITHOUT
 @item  WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
 BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN  A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND
 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES  PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE
 PROVIDE THE PROGRAM ``AS IS'' WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED  DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF  CORRECTION.
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS  
 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE  @item Limitation of Liability.
 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,  
 REPAIR OR CORRECTION.  
   
 @item  
 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR  WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,  CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING  INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED  ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY  NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER  LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE  TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
 POSSIBILITY OF SUCH DAMAGES.  PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
   
   @item Interpretation of Sections 15 and 16.
   
   If the disclaimer of warranty and limitation of liability provided
   above cannot be given local legal effect according to their terms,
   reviewing courts shall apply local law that most closely approximates
   an absolute waiver of all civil liability in connection with the
   Program, unless a warranty or assumption of liability accompanies a
   copy of the Program in return for a fee.
   
 @end enumerate  @end enumerate
   
 @iftex  
 @heading END OF TERMS AND CONDITIONS  @heading END OF TERMS AND CONDITIONS
 @end iftex  
 @ifnottex  
 @center END OF TERMS AND CONDITIONS  
 @end ifnottex  
   
 @page  @heading How to Apply These Terms to Your New Programs
 @unnumberedsec How to Apply These Terms to Your New Programs  
   
   If you develop a new program, and you want it to be of the greatest  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it  possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.  free software which everyone can redistribute and change under these
   terms.
   
   To do so, attach the following notices to the program.  It is safest  To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively  to attach them to the start of each source file to most effectively
 convey the exclusion of warranty; and each file should have at least  state the exclusion of warranty; and each file should have at least
 the ``copyright'' line and a pointer to where the full notice is found.  the ``copyright'' line and a pointer to where the full notice is found.
   
 @smallexample  @smallexample
 @var{one line to give the program's name and a brief idea of what it does.}  @var{one line to give the program's name and a brief idea of what it does.}
 Copyright (C) @var{year}  @var{name of author}  Copyright (C) @var{year} @var{name of author}
   
 This program is free software; you can redistribute it and/or modify  This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by  it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or  the Free Software Foundation, either version 3 of the License, or (at
 (at your option) any later version.  your option) any later version.
   
 This program is distributed in the hope that it will be useful,  This program is distributed in the hope that it will be useful, but
 but WITHOUT ANY WARRANTY; without even the implied warranty of  WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 GNU General Public License for more details.  General Public License for more details.
   
 You should have received a copy of the GNU General Public License  You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software  along with this program.  If not, see @url{http://www.gnu.org/licenses/}.
 Foundation, Inc., 59 Temple Place - Suite 330,  
 Boston, MA 02111-1307, USA.  
 @end smallexample  @end smallexample
   
 Also add information on how to contact you by electronic and paper mail.  Also add information on how to contact you by electronic and paper mail.
   
 If the program is interactive, make it output a short notice like this  If the program does terminal interaction, make it output a short
 when it starts in an interactive mode:  notice like this when it starts in an interactive mode:
   
 @smallexample  @smallexample
 Gnomovision version 69, Copyright (C) @var{year} @var{name of author}  @var{program} Copyright (C) @var{year} @var{name of author}
 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details  This program comes with ABSOLUTELY NO WARRANTY; for details type @samp{show w}.
 type `show w'.  
 This is free software, and you are welcome to redistribute it  This is free software, and you are welcome to redistribute it
 under certain conditions; type `show c' for details.  under certain conditions; type @samp{show c} for details.
 @end smallexample  @end smallexample
   
 The hypothetical commands @samp{show w} and @samp{show c} should show  The hypothetical commands @samp{show w} and @samp{show c} should show
 the appropriate parts of the General Public License.  Of course, the  the appropriate parts of the General Public License.  Of course, your
 commands you use may be called something other than @samp{show w} and  program's commands might be different; for a GUI interface, you would
 @samp{show c}; they could even be mouse-clicks or menu items---whatever  use an ``about box''.
 suits your program.  
   You should also get your employer (if you work as a programmer) or school,
 You should also get your employer (if you work as a programmer) or your  if any, to sign a ``copyright disclaimer'' for the program, if necessary.
 school, if any, to sign a ``copyright disclaimer'' for the program, if  For more information on this, and how to apply and follow the GNU GPL, see
 necessary.  Here is a sample; alter the names:  @url{http://www.gnu.org/licenses/}.
   
 @smallexample  The GNU General Public License does not permit incorporating your
 Yoyodyne, Inc., hereby disclaims all copyright interest in the program  program into proprietary programs.  If your program is a subroutine
 `Gnomovision' (which makes passes at compilers) written by James Hacker.  library, you may consider it more useful to permit linking proprietary
   applications with the library.  If this is what you want to do, use
 @var{signature of Ty Coon}, 1 April 1989  the GNU Lesser General Public License instead of this License.  But
 Ty Coon, President of Vice  first, please read @url{http://www.gnu.org/philosophy/why-not-lgpl.html}.
 @end smallexample  
   
 This General Public License does not permit incorporating your program into  
 proprietary programs.  If your program is a subroutine library, you may  
 consider it more useful to permit linking proprietary applications with the  
 library.  If this is what you want to do, use the GNU Library General  
 Public License instead of this License.  
 @c man end  
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  Added in v.1.2

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