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The GNU General Public License, Version 2, June 1991 (GPLv2) GNU GENERAL PUBLIC LICENSE
============================================================ Version 2, June 1991
> Copyright (C) 1989, 1991 Free Software Foundation, Inc. Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
> 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Everyone is permitted to copy and distribute verbatim copies of this license Preamble
document, but changing it is not allowed.
The licenses for most software are designed to take away your
Preamble freedom to share and change it. By contrast, the GNU General Public
-------- License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
The licenses for most software are designed to take away your freedom to share General Public License applies to most of the Free Software
and change it. By contrast, the GNU General Public License is intended to Foundation's software and to any other program whose authors commit to
guarantee your freedom to share and change free software--to make sure the using it. (Some other Free Software Foundation software is covered by
software is free for all its users. This General Public License applies to most the GNU Lesser General Public License instead.) You can apply it to
of the Free Software Foundation's software and to any other program whose
authors commit to using it. (Some other Free Software Foundation software is
covered by the GNU Lesser General Public License instead.) You can apply it to
your programs, too. your programs, too.
When we speak of free software, we are referring to freedom, not price. Our When we speak of free software, we are referring to freedom, not
General Public Licenses are designed to make sure that you have the freedom to price. Our General Public Licenses are designed to make sure that you
distribute copies of free software (and charge for this service if you wish), have the freedom to distribute copies of free software (and charge for
that you receive source code or can get it if you want it, that you can change this service if you wish), that you receive source code or can get it
the software or use pieces of it in new free programs; and that you know you can if you want it, that you can change the software or use pieces of it
do these things. in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid anyone to deny To protect your rights, we need to make restrictions that forbid
you these rights or to ask you to surrender the rights. These restrictions anyone to deny you these rights or to ask you to surrender the rights.
translate to certain responsibilities for you if you distribute copies of the These restrictions translate to certain responsibilities for you if you
software, or if you modify it. distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether gratis or for a For example, if you distribute copies of such a program, whether
fee, you must give the recipients all the rights that you have. You must make gratis or for a fee, you must give the recipients all the rights that
sure that they, too, receive or can get the source code. And you must show them you have. You must make sure that they, too, receive or can get the
these terms so they know their rights. source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and (2) offer We protect your rights with two steps: (1) copyright the software, and
you this license which gives you legal permission to copy, distribute and/or (2) offer you this license which gives you legal permission to copy,
modify the software. distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain that Also, for each author's protection and ours, we want to make certain
everyone understands that there is no warranty for this free software. If the that everyone understands that there is no warranty for this free
software is modified by someone else and passed on, we want its recipients to software. If the software is modified by someone else and passed on, we
know that what they have is not the original, so that any problems introduced by want its recipients to know that what they have is not the original, so
others will not reflect on the original authors' reputations. that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software patents. We wish Finally, any free program is threatened constantly by software
to avoid the danger that redistributors of a free program will individually patents. We wish to avoid the danger that redistributors of a free
obtain patent licenses, in effect making the program proprietary. To prevent program will individually obtain patent licenses, in effect making the
this, we have made it clear that any patent must be licensed for everyone's free program proprietary. To prevent this, we have made it clear that any
use or not licensed at all. patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and modification The precise terms and conditions for copying, distribution and
follow. modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
Terms And Conditions For Copying, Distribution And Modification 0. This License applies to any program or other work which contains
--------------------------------------------------------------- a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
**0.** This License applies to any program or other work which contains a notice Activities other than copying, distribution and modification are not
placed by the copyright holder saying it may be distributed under the terms of covered by this License; they are outside its scope. The act of
this General Public License. The "Program", below, refers to any such program or running the Program is not restricted, and the output from the Program
work, and a "work based on the Program" means either the Program or any is covered only if its contents constitute a work based on the
derivative work under copyright law: that is to say, a work containing the Program (independent of having been made by running the Program).
Program or a portion of it, either verbatim or with modifications and/or Whether that is true depends on what the Program does.
translated into another language. (Hereinafter, translation is included without
limitation in the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not covered by 1. You may copy and distribute verbatim copies of the Program's
this License; they are outside its scope. The act of running the Program is not source code as you receive it, in any medium, provided that you
restricted, and the output from the Program is covered only if its contents conspicuously and appropriately publish on each copy an appropriate
constitute a work based on the Program (independent of having been made by copyright notice and disclaimer of warranty; keep intact all the
running the Program). Whether that is true depends on what the Program does. notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
**1.** You may copy and distribute verbatim copies of the Program's source code You may charge a fee for the physical act of transferring a copy, and
as you receive it, in any medium, provided that you conspicuously and you may at your option offer warranty protection in exchange for a fee.
appropriately publish on each copy an appropriate copyright notice and
disclaimer of warranty; keep intact all the notices that refer to this License
and to the absence of any warranty; and give any other recipients of the Program
a copy of this License along with the Program.
You may charge a fee for the physical act of transferring a copy, and you may at 2. You may modify your copy or copies of the Program or any portion
your option offer warranty protection in exchange for a fee. of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
**2.** You may modify your copy or copies of the Program or any portion of it, a) You must cause the modified files to carry prominent notices
thus forming a work based on the Program, and copy and distribute such stating that you changed the files and the date of any change.
modifications or work under the terms of Section 1 above, provided that you also
meet all of these conditions:
* **a)** You must cause the modified files to carry prominent notices stating b) You must cause any work that you distribute or publish, that in
that you changed the files and the date of any change. whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
* **b)** You must cause any work that you distribute or publish, that in whole c) If the modified program normally reads commands interactively
or in part contains or is derived from the Program or any part thereof, to when run, you must cause it, when started running for such
be licensed as a whole at no charge to all third parties under the terms of interactive use in the most ordinary way, to print or display an
this License. announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
* **c)** If the modified program normally reads commands interactively when These requirements apply to the modified work as a whole. If
run, you must cause it, when started running for such interactive use in the identifiable sections of that work are not derived from the Program,
most ordinary way, to print or display an announcement including an and can be reasonably considered independent and separate works in
appropriate copyright notice and a notice that there is no warranty (or themselves, then this License, and its terms, do not apply to those
else, saying that you provide a warranty) and that users may redistribute sections when you distribute them as separate works. But when you
the program under these conditions, and telling the user how to view a copy distribute the same sections as part of a whole which is a work based
of this License. (Exception: if the Program itself is interactive but does on the Program, the distribution of the whole must be on the terms of
not normally print such an announcement, your work based on the Program is this License, whose permissions for other licensees extend to the
not required to print an announcement.) entire whole, and thus to each and every part regardless of who wrote it.
These requirements apply to the modified work as a whole. If identifiable Thus, it is not the intent of this section to claim rights or contest
sections of that work are not derived from the Program, and can be reasonably your rights to work written entirely by you; rather, the intent is to
considered independent and separate works in themselves, then this License, and exercise the right to control the distribution of derivative or
its terms, do not apply to those sections when you distribute them as separate collective works based on the Program.
works. But when you distribute the same sections as part of a whole which is a
work based on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the entire whole,
and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest your In addition, mere aggregation of another work not based on the Program
rights to work written entirely by you; rather, the intent is to exercise the with the Program (or with a work based on the Program) on a volume of
right to control the distribution of derivative or collective works based on the a storage or distribution medium does not bring the other work under
Program. the scope of this License.
In addition, mere aggregation of another work not based on the Program with the 3. You may copy and distribute the Program (or a work based on it,
Program (or with a work based on the Program) on a volume of a storage or under Section 2) in object code or executable form under the terms of
distribution medium does not bring the other work under the scope of this Sections 1 and 2 above provided that you also do one of the following:
License.
**3.** You may copy and distribute the Program (or a work based on it, under a) Accompany it with the complete corresponding machine-readable
Section 2) in object code or executable form under the terms of Sections 1 and 2 source code, which must be distributed under the terms of Sections
above provided that you also do one of the following: 1 and 2 above on a medium customarily used for software interchange; or,
* **a)** Accompany it with the complete corresponding machine-readable source b) Accompany it with a written offer, valid for at least three
code, which must be distributed under the terms of Sections 1 and 2 above on years, to give any third party, for a charge no more than your
a medium customarily used for software interchange; or, cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
* **b)** Accompany it with a written offer, valid for at least three years, to c) Accompany it with the information you received as to the offer
give any third party, for a charge no more than your cost of physically to distribute corresponding source code. (This alternative is
performing source distribution, a complete machine-readable copy of the allowed only for noncommercial distribution and only if you
corresponding source code, to be distributed under the terms of Sections 1 received the program in object code or executable form with such
and 2 above on a medium customarily used for software interchange; or, an offer, in accord with Subsection b above.)
* **c)** Accompany it with the information you received as to the offer to The source code for a work means the preferred form of the work for
distribute corresponding source code. (This alternative is allowed only for making modifications to it. For an executable work, complete source
noncommercial distribution and only if you received the program in object code means all the source code for all modules it contains, plus any
code or executable form with such an offer, in accord with Subsection b associated interface definition files, plus the scripts used to
above.) control compilation and installation of the executable. However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
The source code for a work means the preferred form of the work for making If distribution of executable or object code is made by offering
modifications to it. For an executable work, complete source code means all the access to copy from a designated place, then offering equivalent
source code for all modules it contains, plus any associated interface access to copy the source code from the same place counts as
definition files, plus the scripts used to control compilation and installation distribution of the source code, even though third parties are not
of the executable. However, as a special exception, the source code distributed compelled to copy the source along with the object code.
need not include anything that is normally distributed (in either source or
binary form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component itself
accompanies the executable.
If distribution of executable or object code is made by offering access to copy 4. You may not copy, modify, sublicense, or distribute the Program
from a designated place, then offering equivalent access to copy the source code except as expressly provided under this License. Any attempt
from the same place counts as distribution of the source code, even though third otherwise to copy, modify, sublicense or distribute the Program is
parties are not compelled to copy the source along with the object code. void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
**4.** You may not copy, modify, sublicense, or distribute the Program except as 5. You are not required to accept this License, since you have not
expressly provided under this License. Any attempt otherwise to copy, modify, signed it. However, nothing else grants you permission to modify or
sublicense or distribute the Program is void, and will automatically terminate distribute the Program or its derivative works. These actions are
your rights under this License. However, parties who have received copies, or prohibited by law if you do not accept this License. Therefore, by
rights, from you under this License will not have their licenses terminated so modifying or distributing the Program (or any work based on the
long as such parties remain in full compliance. Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
**5.** You are not required to accept this License, since you have not signed
it. However, nothing else grants you permission to modify or distribute the
Program or its derivative works. These actions are prohibited by law if you do
not accept this License. Therefore, by modifying or distributing the Program (or
any work based on the Program), you indicate your acceptance of this License to
do so, and all its terms and conditions for copying, distributing or modifying
the Program or works based on it. the Program or works based on it.
**6.** Each time you redistribute the Program (or any work based on the 6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the original Program), the recipient automatically receives a license from the
licensor to copy, distribute or modify the Program subject to these terms and original licensor to copy, distribute or modify the Program subject to
conditions. You may not impose any further restrictions on the recipients' these terms and conditions. You may not impose any further
exercise of the rights granted herein. You are not responsible for enforcing restrictions on the recipients' exercise of the rights granted herein.
compliance by third parties to this License. You are not responsible for enforcing compliance by third parties to
this License.
**7.** If, as a consequence of a court judgment or allegation of patent 7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues), conditions infringement or for any other reason (not limited to patent issues),
are imposed on you (whether by court order, agreement or otherwise) that conditions are imposed on you (whether by court order, agreement or
contradict the conditions of this License, they do not excuse you from the otherwise) that contradict the conditions of this License, they do not
conditions of this License. If you cannot distribute so as to satisfy excuse you from the conditions of this License. If you cannot
simultaneously your obligations under this License and any other pertinent distribute so as to satisfy simultaneously your obligations under this
obligations, then as a consequence you may not distribute the Program at all. License and any other pertinent obligations, then as a consequence you
For example, if a patent license would not permit royalty-free redistribution of may not distribute the Program at all. For example, if a patent
the Program by all those who receive copies directly or indirectly through you, license would not permit royalty-free redistribution of the Program by
then the only way you could satisfy both it and this License would be to refrain all those who receive copies directly or indirectly through you, then
entirely from distribution of the Program. the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under any If any portion of this section is held invalid or unenforceable under
particular circumstance, the balance of the section is intended to apply and the any particular circumstance, the balance of the section is intended to
section as a whole is intended to apply in other circumstances. apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any patents or It is not the purpose of this section to induce you to infringe any
other property right claims or to contest validity of any such claims; this patents or other property right claims or to contest validity of any
section has the sole purpose of protecting the integrity of the free software such claims; this section has the sole purpose of protecting the
distribution system, which is implemented by public license practices. Many integrity of the free software distribution system, which is
people have made generous contributions to the wide range of software implemented by public license practices. Many people have made
distributed through that system in reliance on consistent application of that generous contributions to the wide range of software distributed
system; it is up to the author/donor to decide if he or she is willing to through that system in reliance on consistent application of that
distribute software through any other system and a licensee cannot impose that system; it is up to the author/donor to decide if he or she is willing
choice. to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to be a This section is intended to make thoroughly clear what is believed to
consequence of the rest of this License. be a consequence of the rest of this License.
**8.** If the distribution and/or use of the Program is restricted in certain 8. If the distribution and/or use of the Program is restricted in
countries either by patents or by copyrighted interfaces, the original copyright certain countries either by patents or by copyrighted interfaces, the
holder who places the Program under this License may add an explicit original copyright holder who places the Program under this License
geographical distribution limitation excluding those countries, so that may add an explicit geographical distribution limitation excluding
distribution is permitted only in or among countries not thus excluded. In such those countries, so that distribution is permitted only in or among
case, this License incorporates the limitation as if written in the body of this countries not thus excluded. In such case, this License incorporates
License. the limitation as if written in the body of this License.
**9.** The Free Software Foundation may publish revised and/or new versions of 9. The Free Software Foundation may publish revised and/or new versions
the General Public License from time to time. Such new versions will be similar of the General Public License from time to time. Such new versions will
in spirit to the present version, but may differ in detail to address new be similar in spirit to the present version, but may differ in detail to
problems or concerns. address new problems or concerns.
Each version is given a distinguishing version number. If the Program specifies Each version is given a distinguishing version number. If the Program
a version number of this License which applies to it and "any later version", specifies a version number of this License which applies to it and "any
you have the option of following the terms and conditions either of that version later version", you have the option of following the terms and conditions
or of any later version published by the Free Software Foundation. If the either of that version or of any later version published by the Free
Program does not specify a version number of this License, you may choose any Software Foundation. If the Program does not specify a version number of
version ever published by the Free Software Foundation. this License, you may choose any version ever published by the Free Software
Foundation.
**10.** If you wish to incorporate parts of the Program into other free programs 10. If you wish to incorporate parts of the Program into other free
whose distribution conditions are different, write to the author to ask for programs whose distribution conditions are different, write to the author
permission. For software which is copyrighted by the Free Software Foundation, to ask for permission. For software which is copyrighted by the Free
write to the Free Software Foundation; we sometimes make exceptions for this. Software Foundation, write to the Free Software Foundation; we sometimes
Our decision will be guided by the two goals of preserving the free status of make exceptions for this. Our decision will be guided by the two goals
all derivatives of our free software and of promoting the sharing and reuse of of preserving the free status of all derivatives of our free software and
software generally. of promoting the sharing and reuse of software generally.
NO WARRANTY
No Warranty 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
----------- FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
**11.** BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
"AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
ALL NECESSARY SERVICING, REPAIR OR CORRECTION. PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
**12.** IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING END OF TERMS AND CONDITIONS
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY How to Apply These Terms to Your New Programs
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA If you develop a new program, and you want it to be of the greatest
BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A possible use to the public, the best way to achieve this is to make it
FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER free software which everyone can redistribute and change under these terms.
OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.