LICENSE.md (35085B) - raw


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