github.com/geph-official/geph2@v0.22.6-0.20210211030601-f527cb59b0df/LICENSE.md (about)

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