license/gpl.txt
author František Kučera <franta-hg@frantovo.cz>
Fri, 27 Dec 2013 18:22:19 +0100
branchv_0
changeset 83 9563232ea0b7
parent 16 5b8fcd35d4d6
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     1                     GNU GENERAL PUBLIC LICENSE
     2                        Version 3, 29 June 2007
     3 
     4  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
     5  Everyone is permitted to copy and distribute verbatim copies
     6  of this license document, but changing it is not allowed.
     7 
     8                             Preamble
     9 
    10   The GNU General Public License is a free, copyleft license for
    11 software and other kinds of works.
    12 
    13   The licenses for most software and other practical works are designed
    14 to take away your freedom to share and change the works.  By contrast,
    15 the GNU General Public License is intended to guarantee your freedom to
    16 share and change all versions of a program--to make sure it remains free
    17 software for all its users.  We, the Free Software Foundation, use the
    18 GNU General Public License for most of our software; it applies also to
    19 any other work released this way by its authors.  You can apply it to
    20 your programs, too.
    21 
    22   When we speak of free software, we are referring to freedom, not
    23 price.  Our General Public Licenses are designed to make sure that you
    24 have the freedom to distribute copies of free software (and charge for
    25 them if you wish), that you receive source code or can get it if you
    26 want it, that you can change the software or use pieces of it in new
    27 free programs, and that you know you can do these things.
    28 
    29   To protect your rights, we need to prevent others from denying you
    30 these rights or asking you to surrender the rights.  Therefore, you have
    31 certain responsibilities if you distribute copies of the software, or if
    32 you modify it: responsibilities to respect the freedom of others.
    33 
    34   For example, if you distribute copies of such a program, whether
    35 gratis or for a fee, you must pass on to the recipients the same
    36 freedoms that you received.  You must make sure that they, too, receive
    37 or can get the source code.  And you must show them these terms so they
    38 know their rights.
    39 
    40   Developers that use the GNU GPL protect your rights with two steps:
    41 (1) assert copyright on the software, and (2) offer you this License
    42 giving you legal permission to copy, distribute and/or modify it.
    43 
    44   For the developers' and authors' protection, the GPL clearly explains
    45 that there is no warranty for this free software.  For both users' and
    46 authors' sake, the GPL requires that modified versions be marked as
    47 changed, so that their problems will not be attributed erroneously to
    48 authors of previous versions.
    49 
    50   Some devices are designed to deny users access to install or run
    51 modified versions of the software inside them, although the manufacturer
    52 can do so.  This is fundamentally incompatible with the aim of
    53 protecting users' freedom to change the software.  The systematic
    54 pattern of such abuse occurs in the area of products for individuals to
    55 use, which is precisely where it is most unacceptable.  Therefore, we
    56 have designed this version of the GPL to prohibit the practice for those
    57 products.  If such problems arise substantially in other domains, we
    58 stand ready to extend this provision to those domains in future versions
    59 of the GPL, as needed to protect the freedom of users.
    60 
    61   Finally, every program is threatened constantly by software patents.
    62 States should not allow patents to restrict development and use of
    63 software on general-purpose computers, but in those that do, we wish to
    64 avoid the special danger that patents applied to a free program could
    65 make it effectively proprietary.  To prevent this, the GPL assures that
    66 patents cannot be used to render the program non-free.
    67 
    68   The precise terms and conditions for copying, distribution and
    69 modification follow.
    70 
    71                        TERMS AND CONDITIONS
    72 
    73   0. Definitions.
    74 
    75   "This License" refers to version 3 of the GNU General Public License.
    76 
    77   "Copyright" also means copyright-like laws that apply to other kinds of
    78 works, such as semiconductor masks.
    79 
    80   "The Program" refers to any copyrightable work licensed under this
    81 License.  Each licensee is addressed as "you".  "Licensees" and
    82 "recipients" may be individuals or organizations.
    83 
    84   To "modify" a work means to copy from or adapt all or part of the work
    85 in a fashion requiring copyright permission, other than the making of an
    86 exact copy.  The resulting work is called a "modified version" of the
    87 earlier work or a work "based on" the earlier work.
    88 
    89   A "covered work" means either the unmodified Program or a work based
    90 on the Program.
    91 
    92   To "propagate" a work means to do anything with it that, without
    93 permission, would make you directly or secondarily liable for
    94 infringement under applicable copyright law, except executing it on a
    95 computer or modifying a private copy.  Propagation includes copying,
    96 distribution (with or without modification), making available to the
    97 public, and in some countries other activities as well.
    98 
    99   To "convey" a work means any kind of propagation that enables other
   100 parties to make or receive copies.  Mere interaction with a user through
   101 a computer network, with no transfer of a copy, is not conveying.
   102 
   103   An interactive user interface displays "Appropriate Legal Notices"
   104 to the extent that it includes a convenient and prominently visible
   105 feature that (1) displays an appropriate copyright notice, and (2)
   106 tells the user that there is no warranty for the work (except to the
   107 extent that warranties are provided), that licensees may convey the
   108 work under this License, and how to view a copy of this License.  If
   109 the interface presents a list of user commands or options, such as a
   110 menu, a prominent item in the list meets this criterion.
   111 
   112   1. Source Code.
   113 
   114   The "source code" for a work means the preferred form of the work
   115 for making modifications to it.  "Object code" means any non-source
   116 form of a work.
   117 
   118   A "Standard Interface" means an interface that either is an official
   119 standard defined by a recognized standards body, or, in the case of
   120 interfaces specified for a particular programming language, one that
   121 is widely used among developers working in that language.
   122 
   123   The "System Libraries" of an executable work include anything, other
   124 than the work as a whole, that (a) is included in the normal form of
   125 packaging a Major Component, but which is not part of that Major
   126 Component, and (b) serves only to enable use of the work with that
   127 Major Component, or to implement a Standard Interface for which an
   128 implementation is available to the public in source code form.  A
   129 "Major Component", in this context, means a major essential component
   130 (kernel, window system, and so on) of the specific operating system
   131 (if any) on which the executable work runs, or a compiler used to
   132 produce the work, or an object code interpreter used to run it.
   133 
   134   The "Corresponding Source" for a work in object code form means all
   135 the source code needed to generate, install, and (for an executable
   136 work) run the object code and to modify the work, including scripts to
   137 control those activities.  However, it does not include the work's
   138 System Libraries, or general-purpose tools or generally available free
   139 programs which are used unmodified in performing those activities but
   140 which are not part of the work.  For example, Corresponding Source
   141 includes interface definition files associated with source files for
   142 the work, and the source code for shared libraries and dynamically
   143 linked subprograms that the work is specifically designed to require,
   144 such as by intimate data communication or control flow between those
   145 subprograms and other parts of the work.
   146 
   147   The Corresponding Source need not include anything that users
   148 can regenerate automatically from other parts of the Corresponding
   149 Source.
   150 
   151   The Corresponding Source for a work in source code form is that
   152 same work.
   153 
   154   2. Basic Permissions.
   155 
   156   All rights granted under this License are granted for the term of
   157 copyright on the Program, and are irrevocable provided the stated
   158 conditions are met.  This License explicitly affirms your unlimited
   159 permission to run the unmodified Program.  The output from running a
   160 covered work is covered by this License only if the output, given its
   161 content, constitutes a covered work.  This License acknowledges your
   162 rights of fair use or other equivalent, as provided by copyright law.
   163 
   164   You may make, run and propagate covered works that you do not
   165 convey, without conditions so long as your license otherwise remains
   166 in force.  You may convey covered works to others for the sole purpose
   167 of having them make modifications exclusively for you, or provide you
   168 with facilities for running those works, provided that you comply with
   169 the terms of this License in conveying all material for which you do
   170 not control copyright.  Those thus making or running the covered works
   171 for you must do so exclusively on your behalf, under your direction
   172 and control, on terms that prohibit them from making any copies of
   173 your copyrighted material outside their relationship with you.
   174 
   175   Conveying under any other circumstances is permitted solely under
   176 the conditions stated below.  Sublicensing is not allowed; section 10
   177 makes it unnecessary.
   178 
   179   3. Protecting Users' Legal Rights From Anti-Circumvention Law.
   180 
   181   No covered work shall be deemed part of an effective technological
   182 measure under any applicable law fulfilling obligations under article
   183 11 of the WIPO copyright treaty adopted on 20 December 1996, or
   184 similar laws prohibiting or restricting circumvention of such
   185 measures.
   186 
   187   When you convey a covered work, you waive any legal power to forbid
   188 circumvention of technological measures to the extent such circumvention
   189 is effected by exercising rights under this License with respect to
   190 the covered work, and you disclaim any intention to limit operation or
   191 modification of the work as a means of enforcing, against the work's
   192 users, your or third parties' legal rights to forbid circumvention of
   193 technological measures.
   194 
   195   4. Conveying Verbatim Copies.
   196 
   197   You may convey verbatim copies of the Program's source code as you
   198 receive it, in any medium, provided that you conspicuously and
   199 appropriately publish on each copy an appropriate copyright notice;
   200 keep intact all notices stating that this License and any
   201 non-permissive terms added in accord with section 7 apply to the code;
   202 keep intact all notices of the absence of any warranty; and give all
   203 recipients a copy of this License along with the Program.
   204 
   205   You may charge any price or no price for each copy that you convey,
   206 and you may offer support or warranty protection for a fee.
   207 
   208   5. Conveying Modified Source Versions.
   209 
   210   You may convey a work based on the Program, or the modifications to
   211 produce it from the Program, in the form of source code under the
   212 terms of section 4, provided that you also meet all of these conditions:
   213 
   214     a) The work must carry prominent notices stating that you modified
   215     it, and giving a relevant date.
   216 
   217     b) The work must carry prominent notices stating that it is
   218     released under this License and any conditions added under section
   219     7.  This requirement modifies the requirement in section 4 to
   220     "keep intact all notices".
   221 
   222     c) You must license the entire work, as a whole, under this
   223     License to anyone who comes into possession of a copy.  This
   224     License will therefore apply, along with any applicable section 7
   225     additional terms, to the whole of the work, and all its parts,
   226     regardless of how they are packaged.  This License gives no
   227     permission to license the work in any other way, but it does not
   228     invalidate such permission if you have separately received it.
   229 
   230     d) If the work has interactive user interfaces, each must display
   231     Appropriate Legal Notices; however, if the Program has interactive
   232     interfaces that do not display Appropriate Legal Notices, your
   233     work need not make them do so.
   234 
   235   A compilation of a covered work with other separate and independent
   236 works, which are not by their nature extensions of the covered work,
   237 and which are not combined with it such as to form a larger program,
   238 in or on a volume of a storage or distribution medium, is called an
   239 "aggregate" if the compilation and its resulting copyright are not
   240 used to limit the access or legal rights of the compilation's users
   241 beyond what the individual works permit.  Inclusion of a covered work
   242 in an aggregate does not cause this License to apply to the other
   243 parts of the aggregate.
   244 
   245   6. Conveying Non-Source Forms.
   246 
   247   You may convey a covered work in object code form under the terms
   248 of sections 4 and 5, provided that you also convey the
   249 machine-readable Corresponding Source under the terms of this License,
   250 in one of these ways:
   251 
   252     a) Convey the object code in, or embodied in, a physical product
   253     (including a physical distribution medium), accompanied by the
   254     Corresponding Source fixed on a durable physical medium
   255     customarily used for software interchange.
   256 
   257     b) Convey the object code in, or embodied in, a physical product
   258     (including a physical distribution medium), accompanied by a
   259     written offer, valid for at least three years and valid for as
   260     long as you offer spare parts or customer support for that product
   261     model, to give anyone who possesses the object code either (1) a
   262     copy of the Corresponding Source for all the software in the
   263     product that is covered by this License, on a durable physical
   264     medium customarily used for software interchange, for a price no
   265     more than your reasonable cost of physically performing this
   266     conveying of source, or (2) access to copy the
   267     Corresponding Source from a network server at no charge.
   268 
   269     c) Convey individual copies of the object code with a copy of the
   270     written offer to provide the Corresponding Source.  This
   271     alternative is allowed only occasionally and noncommercially, and
   272     only if you received the object code with such an offer, in accord
   273     with subsection 6b.
   274 
   275     d) Convey the object code by offering access from a designated
   276     place (gratis or for a charge), and offer equivalent access to the
   277     Corresponding Source in the same way through the same place at no
   278     further charge.  You need not require recipients to copy the
   279     Corresponding Source along with the object code.  If the place to
   280     copy the object code is a network server, the Corresponding Source
   281     may be on a different server (operated by you or a third party)
   282     that supports equivalent copying facilities, provided you maintain
   283     clear directions next to the object code saying where to find the
   284     Corresponding Source.  Regardless of what server hosts the
   285     Corresponding Source, you remain obligated to ensure that it is
   286     available for as long as needed to satisfy these requirements.
   287 
   288     e) Convey the object code using peer-to-peer transmission, provided
   289     you inform other peers where the object code and Corresponding
   290     Source of the work are being offered to the general public at no
   291     charge under subsection 6d.
   292 
   293   A separable portion of the object code, whose source code is excluded
   294 from the Corresponding Source as a System Library, need not be
   295 included in conveying the object code work.
   296 
   297   A "User Product" is either (1) a "consumer product", which means any
   298 tangible personal property which is normally used for personal, family,
   299 or household purposes, or (2) anything designed or sold for incorporation
   300 into a dwelling.  In determining whether a product is a consumer product,
   301 doubtful cases shall be resolved in favor of coverage.  For a particular
   302 product received by a particular user, "normally used" refers to a
   303 typical or common use of that class of product, regardless of the status
   304 of the particular user or of the way in which the particular user
   305 actually uses, or expects or is expected to use, the product.  A product
   306 is a consumer product regardless of whether the product has substantial
   307 commercial, industrial or non-consumer uses, unless such uses represent
   308 the only significant mode of use of the product.
   309 
   310   "Installation Information" for a User Product means any methods,
   311 procedures, authorization keys, or other information required to install
   312 and execute modified versions of a covered work in that User Product from
   313 a modified version of its Corresponding Source.  The information must
   314 suffice to ensure that the continued functioning of the modified object
   315 code is in no case prevented or interfered with solely because
   316 modification has been made.
   317 
   318   If you convey an object code work under this section in, or with, or
   319 specifically for use in, a User Product, and the conveying occurs as
   320 part of a transaction in which the right of possession and use of the
   321 User Product is transferred to the recipient in perpetuity or for a
   322 fixed term (regardless of how the transaction is characterized), the
   323 Corresponding Source conveyed under this section must be accompanied
   324 by the Installation Information.  But this requirement does not apply
   325 if neither you nor any third party retains the ability to install
   326 modified object code on the User Product (for example, the work has
   327 been installed in ROM).
   328 
   329   The requirement to provide Installation Information does not include a
   330 requirement to continue to provide support service, warranty, or updates
   331 for a work that has been modified or installed by the recipient, or for
   332 the User Product in which it has been modified or installed.  Access to a
   333 network may be denied when the modification itself materially and
   334 adversely affects the operation of the network or violates the rules and
   335 protocols for communication across the network.
   336 
   337   Corresponding Source conveyed, and Installation Information provided,
   338 in accord with this section must be in a format that is publicly
   339 documented (and with an implementation available to the public in
   340 source code form), and must require no special password or key for
   341 unpacking, reading or copying.
   342 
   343   7. Additional Terms.
   344 
   345   "Additional permissions" are terms that supplement the terms of this
   346 License by making exceptions from one or more of its conditions.
   347 Additional permissions that are applicable to the entire Program shall
   348 be treated as though they were included in this License, to the extent
   349 that they are valid under applicable law.  If additional permissions
   350 apply only to part of the Program, that part may be used separately
   351 under those permissions, but the entire Program remains governed by
   352 this License without regard to the additional permissions.
   353 
   354   When you convey a copy of a covered work, you may at your option
   355 remove any additional permissions from that copy, or from any part of
   356 it.  (Additional permissions may be written to require their own
   357 removal in certain cases when you modify the work.)  You may place
   358 additional permissions on material, added by you to a covered work,
   359 for which you have or can give appropriate copyright permission.
   360 
   361   Notwithstanding any other provision of this License, for material you
   362 add to a covered work, you may (if authorized by the copyright holders of
   363 that material) supplement the terms of this License with terms:
   364 
   365     a) Disclaiming warranty or limiting liability differently from the
   366     terms of sections 15 and 16 of this License; or
   367 
   368     b) Requiring preservation of specified reasonable legal notices or
   369     author attributions in that material or in the Appropriate Legal
   370     Notices displayed by works containing it; or
   371 
   372     c) Prohibiting misrepresentation of the origin of that material, or
   373     requiring that modified versions of such material be marked in
   374     reasonable ways as different from the original version; or
   375 
   376     d) Limiting the use for publicity purposes of names of licensors or
   377     authors of the material; or
   378 
   379     e) Declining to grant rights under trademark law for use of some
   380     trade names, trademarks, or service marks; or
   381 
   382     f) Requiring indemnification of licensors and authors of that
   383     material by anyone who conveys the material (or modified versions of
   384     it) with contractual assumptions of liability to the recipient, for
   385     any liability that these contractual assumptions directly impose on
   386     those licensors and authors.
   387 
   388   All other non-permissive additional terms are considered "further
   389 restrictions" within the meaning of section 10.  If the Program as you
   390 received it, or any part of it, contains a notice stating that it is
   391 governed by this License along with a term that is a further
   392 restriction, you may remove that term.  If a license document contains
   393 a further restriction but permits relicensing or conveying under this
   394 License, you may add to a covered work material governed by the terms
   395 of that license document, provided that the further restriction does
   396 not survive such relicensing or conveying.
   397 
   398   If you add terms to a covered work in accord with this section, you
   399 must place, in the relevant source files, a statement of the
   400 additional terms that apply to those files, or a notice indicating
   401 where to find the applicable terms.
   402 
   403   Additional terms, permissive or non-permissive, may be stated in the
   404 form of a separately written license, or stated as exceptions;
   405 the above requirements apply either way.
   406 
   407   8. Termination.
   408 
   409   You may not propagate or modify a covered work except as expressly
   410 provided under this License.  Any attempt otherwise to propagate or
   411 modify it is void, and will automatically terminate your rights under
   412 this License (including any patent licenses granted under the third
   413 paragraph of section 11).
   414 
   415   However, if you cease all violation of this License, then your
   416 license from a particular copyright holder is reinstated (a)
   417 provisionally, unless and until the copyright holder explicitly and
   418 finally terminates your license, and (b) permanently, if the copyright
   419 holder fails to notify you of the violation by some reasonable means
   420 prior to 60 days after the cessation.
   421 
   422   Moreover, your license from a particular copyright holder is
   423 reinstated permanently if the copyright holder notifies you of the
   424 violation by some reasonable means, this is the first time you have
   425 received notice of violation of this License (for any work) from that
   426 copyright holder, and you cure the violation prior to 30 days after
   427 your receipt of the notice.
   428 
   429   Termination of your rights under this section does not terminate the
   430 licenses of parties who have received copies or rights from you under
   431 this License.  If your rights have been terminated and not permanently
   432 reinstated, you do not qualify to receive new licenses for the same
   433 material under section 10.
   434 
   435   9. Acceptance Not Required for Having Copies.
   436 
   437   You are not required to accept this License in order to receive or
   438 run a copy of the Program.  Ancillary propagation of a covered work
   439 occurring solely as a consequence of using peer-to-peer transmission
   440 to receive a copy likewise does not require acceptance.  However,
   441 nothing other than this License grants you permission to propagate or
   442 modify any covered work.  These actions infringe copyright if you do
   443 not accept this License.  Therefore, by modifying or propagating a
   444 covered work, you indicate your acceptance of this License to do so.
   445 
   446   10. Automatic Licensing of Downstream Recipients.
   447 
   448   Each time you convey a covered work, the recipient automatically
   449 receives a license from the original licensors, to run, modify and
   450 propagate that work, subject to this License.  You are not responsible
   451 for enforcing compliance by third parties with this License.
   452 
   453   An "entity transaction" is a transaction transferring control of an
   454 organization, or substantially all assets of one, or subdividing an
   455 organization, or merging organizations.  If propagation of a covered
   456 work results from an entity transaction, each party to that
   457 transaction who receives a copy of the work also receives whatever
   458 licenses to the work the party's predecessor in interest had or could
   459 give under the previous paragraph, plus a right to possession of the
   460 Corresponding Source of the work from the predecessor in interest, if
   461 the predecessor has it or can get it with reasonable efforts.
   462 
   463   You may not impose any further restrictions on the exercise of the
   464 rights granted or affirmed under this License.  For example, you may
   465 not impose a license fee, royalty, or other charge for exercise of
   466 rights granted under this License, and you may not initiate litigation
   467 (including a cross-claim or counterclaim in a lawsuit) alleging that
   468 any patent claim is infringed by making, using, selling, offering for
   469 sale, or importing the Program or any portion of it.
   470 
   471   11. Patents.
   472 
   473   A "contributor" is a copyright holder who authorizes use under this
   474 License of the Program or a work on which the Program is based.  The
   475 work thus licensed is called the contributor's "contributor version".
   476 
   477   A contributor's "essential patent claims" are all patent claims
   478 owned or controlled by the contributor, whether already acquired or
   479 hereafter acquired, that would be infringed by some manner, permitted
   480 by this License, of making, using, or selling its contributor version,
   481 but do not include claims that would be infringed only as a
   482 consequence of further modification of the contributor version.  For
   483 purposes of this definition, "control" includes the right to grant
   484 patent sublicenses in a manner consistent with the requirements of
   485 this License.
   486 
   487   Each contributor grants you a non-exclusive, worldwide, royalty-free
   488 patent license under the contributor's essential patent claims, to
   489 make, use, sell, offer for sale, import and otherwise run, modify and
   490 propagate the contents of its contributor version.
   491 
   492   In the following three paragraphs, a "patent license" is any express
   493 agreement or commitment, however denominated, not to enforce a patent
   494 (such as an express permission to practice a patent or covenant not to
   495 sue for patent infringement).  To "grant" such a patent license to a
   496 party means to make such an agreement or commitment not to enforce a
   497 patent against the party.
   498 
   499   If you convey a covered work, knowingly relying on a patent license,
   500 and the Corresponding Source of the work is not available for anyone
   501 to copy, free of charge and under the terms of this License, through a
   502 publicly available network server or other readily accessible means,
   503 then you must either (1) cause the Corresponding Source to be so
   504 available, or (2) arrange to deprive yourself of the benefit of the
   505 patent license for this particular work, or (3) arrange, in a manner
   506 consistent with the requirements of this License, to extend the patent
   507 license to downstream recipients.  "Knowingly relying" means you have
   508 actual knowledge that, but for the patent license, your conveying the
   509 covered work in a country, or your recipient's use of the covered work
   510 in a country, would infringe one or more identifiable patents in that
   511 country that you have reason to believe are valid.
   512 
   513   If, pursuant to or in connection with a single transaction or
   514 arrangement, you convey, or propagate by procuring conveyance of, a
   515 covered work, and grant a patent license to some of the parties
   516 receiving the covered work authorizing them to use, propagate, modify
   517 or convey a specific copy of the covered work, then the patent license
   518 you grant is automatically extended to all recipients of the covered
   519 work and works based on it.
   520 
   521   A patent license is "discriminatory" if it does not include within
   522 the scope of its coverage, prohibits the exercise of, or is
   523 conditioned on the non-exercise of one or more of the rights that are
   524 specifically granted under this License.  You may not convey a covered
   525 work if you are a party to an arrangement with a third party that is
   526 in the business of distributing software, under which you make payment
   527 to the third party based on the extent of your activity of conveying
   528 the work, and under which the third party grants, to any of the
   529 parties who would receive the covered work from you, a discriminatory
   530 patent license (a) in connection with copies of the covered work
   531 conveyed by you (or copies made from those copies), or (b) primarily
   532 for and in connection with specific products or compilations that
   533 contain the covered work, unless you entered into that arrangement,
   534 or that patent license was granted, prior to 28 March 2007.
   535 
   536   Nothing in this License shall be construed as excluding or limiting
   537 any implied license or other defenses to infringement that may
   538 otherwise be available to you under applicable patent law.
   539 
   540   12. No Surrender of Others' Freedom.
   541 
   542   If conditions are imposed on you (whether by court order, agreement or
   543 otherwise) that contradict the conditions of this License, they do not
   544 excuse you from the conditions of this License.  If you cannot convey a
   545 covered work so as to satisfy simultaneously your obligations under this
   546 License and any other pertinent obligations, then as a consequence you may
   547 not convey it at all.  For example, if you agree to terms that obligate you
   548 to collect a royalty for further conveying from those to whom you convey
   549 the Program, the only way you could satisfy both those terms and this
   550 License would be to refrain entirely from conveying the Program.
   551 
   552   13. Use with the GNU Affero General Public License.
   553 
   554   Notwithstanding any other provision of this License, you have
   555 permission to link or combine any covered work with a work licensed
   556 under version 3 of the GNU Affero General Public License into a single
   557 combined work, and to convey the resulting work.  The terms of this
   558 License will continue to apply to the part which is the covered work,
   559 but the special requirements of the GNU Affero General Public License,
   560 section 13, concerning interaction through a network will apply to the
   561 combination as such.
   562 
   563   14. Revised Versions of this License.
   564 
   565   The Free Software Foundation may publish revised and/or new versions of
   566 the GNU General Public License from time to time.  Such new versions will
   567 be similar in spirit to the present version, but may differ in detail to
   568 address new problems or concerns.
   569 
   570   Each version is given a distinguishing version number.  If the
   571 Program specifies that a certain numbered version of the GNU General
   572 Public License "or any later version" applies to it, you have the
   573 option of following the terms and conditions either of that numbered
   574 version or of any later version published by the Free Software
   575 Foundation.  If the Program does not specify a version number of the
   576 GNU General Public License, you may choose any version ever published
   577 by the Free Software Foundation.
   578 
   579   If the Program specifies that a proxy can decide which future
   580 versions of the GNU General Public License can be used, that proxy's
   581 public statement of acceptance of a version permanently authorizes you
   582 to choose that version for the Program.
   583 
   584   Later license versions may give you additional or different
   585 permissions.  However, no additional obligations are imposed on any
   586 author or copyright holder as a result of your choosing to follow a
   587 later version.
   588 
   589   15. Disclaimer of Warranty.
   590 
   591   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
   592 APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
   593 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
   594 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
   595 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   596 PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
   597 IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
   598 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
   599 
   600   16. Limitation of Liability.
   601 
   602   IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
   603 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
   604 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
   605 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
   606 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
   607 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
   608 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
   609 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
   610 SUCH DAMAGES.
   611 
   612   17. Interpretation of Sections 15 and 16.
   613 
   614   If the disclaimer of warranty and limitation of liability provided
   615 above cannot be given local legal effect according to their terms,
   616 reviewing courts shall apply local law that most closely approximates
   617 an absolute waiver of all civil liability in connection with the
   618 Program, unless a warranty or assumption of liability accompanies a
   619 copy of the Program in return for a fee.
   620 
   621                      END OF TERMS AND CONDITIONS
   622 
   623             How to Apply These Terms to Your New Programs
   624 
   625   If you develop a new program, and you want it to be of the greatest
   626 possible use to the public, the best way to achieve this is to make it
   627 free software which everyone can redistribute and change under these terms.
   628 
   629   To do so, attach the following notices to the program.  It is safest
   630 to attach them to the start of each source file to most effectively
   631 state the exclusion of warranty; and each file should have at least
   632 the "copyright" line and a pointer to where the full notice is found.
   633 
   634     <one line to give the program's name and a brief idea of what it does.>
   635     Copyright (C) <year>  <name of author>
   636 
   637     This program is free software: you can redistribute it and/or modify
   638     it under the terms of the GNU General Public License as published by
   639     the Free Software Foundation, either version 3 of the License, or
   640     (at your option) any later version.
   641 
   642     This program is distributed in the hope that it will be useful,
   643     but WITHOUT ANY WARRANTY; without even the implied warranty of
   644     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   645     GNU General Public License for more details.
   646 
   647     You should have received a copy of the GNU General Public License
   648     along with this program.  If not, see <http://www.gnu.org/licenses/>.
   649 
   650 Also add information on how to contact you by electronic and paper mail.
   651 
   652   If the program does terminal interaction, make it output a short
   653 notice like this when it starts in an interactive mode:
   654 
   655     <program>  Copyright (C) <year>  <name of author>
   656     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
   657     This is free software, and you are welcome to redistribute it
   658     under certain conditions; type `show c' for details.
   659 
   660 The hypothetical commands `show w' and `show c' should show the appropriate
   661 parts of the General Public License.  Of course, your program's commands
   662 might be different; for a GUI interface, you would use an "about box".
   663 
   664   You should also get your employer (if you work as a programmer) or school,
   665 if any, to sign a "copyright disclaimer" for the program, if necessary.
   666 For more information on this, and how to apply and follow the GNU GPL, see
   667 <http://www.gnu.org/licenses/>.
   668 
   669   The GNU General Public License does not permit incorporating your program
   670 into proprietary programs.  If your program is a subroutine library, you
   671 may consider it more useful to permit linking proprietary applications with
   672 the library.  If this is what you want to do, use the GNU Lesser General
   673 Public License instead of this License.  But first, please read
   674 <http://www.gnu.org/philosophy/why-not-lgpl.html>.