license.txt 34 KB

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