Contents of /manuals/trunk/tutorial/COPYING

Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided also that
the sections that reprint ``The GNU General Public License'', ``The
GNU Library General Public License'', and other clearly marked
sections held under separate copyright are reproduced under the
conditions given within them, and provided that the entire resulting
derived work is distributed under the terms of a permission notice
identical to this one.

Permission is granted to copy and distribute translations of
this manual into another language under the conditions for modified
versions.  ``The GNU General Public License'' and ``The GNU Library
General Public License'' may be included in a translation approved by
the Free Software Foundation instead of in the original English.

At your option, you may distribute verbatim and modified versions of
this document under the terms of the GNU General Public License,
excepting the clearly marked sections held under separate copyright.
The GNU General Public License follows.


                    GNU GENERAL PUBLIC LICENSE
                       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
                          675 Mass Ave, Cambridge, MA 02139, USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The licenses for most software are designed to take away your
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
General Public License applies to most 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 Library General Public License instead.)  You can apply it to
your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
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 you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
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 fee, you must give the recipients all the rights that
you have.  You must make sure that they, too, receive or can get the
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 you this license which gives you legal permission to copy,
distribute and/or modify the software.

  Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software.  If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
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 to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary.  To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.

  The precise terms and conditions for copying, distribution and
modification follow.

                    GNU GENERAL PUBLIC LICENSE
   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".

Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope.  The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.

  1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and 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 your option offer warranty protection in exchange for a fee.

  2. You may modify your copy or copies of the Program or any portion
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:

    a) You must cause the modified files to carry prominent notices
    stating that you changed the files and the date of any change.

    b) You must cause any work that you distribute or publish, that in
    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.

    c) If the modified program normally reads commands interactively
    when run, you must cause it, when started running for such
    interactive use in the most ordinary way, to print or display an
    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.)

These requirements apply to the modified work as a whole.  If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate 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 rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.

In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.

  3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:

    a) Accompany it with the complete corresponding machine-readable
    source code, which must 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 give any third party, for a charge no more than your
    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,

    c) Accompany it with the information you received as to the offer
    to distribute corresponding source code.  (This alternative is
    allowed only for noncommercial distribution and only if you
    received the program in object code or executable form with such
    an offer, in accord with Subsection b above.)

The source code for a work means the preferred form of the work for
making modifications to it.  For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
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.

If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.

  4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License.  Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
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.

  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.

  6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions.  You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
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
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License.  If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all.  For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
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 particular circumstance, the balance of the section is intended to
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 other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices.  Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
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 consequence of the rest of this License.

  8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded.  In such case, this License incorporates
the limitation as if written in the body of this License.

  9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time.  Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

Each version is given a distinguishing version number.  If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation.  If the Program does not specify a version number of
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 whose distribution conditions are different, write to the author
to ask for permission.  For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this.  Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.

                            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.

  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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 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 BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

  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) 19yy  <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., 675 Mass Ave, Cambridge, MA 02139, 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) 19yy 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 Library General
Public License instead of this License.
1	Permission is granted to make and distribute verbatim copies of this
2	manual provided the copyright notice and this permission notice are
3	preserved on all copies.
4
5	Permission is granted to copy and distribute modified versions of this
6	manual under the conditions for verbatim copying, provided also that
7	the sections that reprint ``The GNU General Public License'', ``The
8	GNU Library General Public License'', and other clearly marked
9	sections held under separate copyright are reproduced under the
10	conditions given within them, and provided that the entire resulting
11	derived work is distributed under the terms of a permission notice
12	identical to this one.
13
14	Permission is granted to copy and distribute translations of
15	this manual into another language under the conditions for modified
16	versions. ``The GNU General Public License'' and ``The GNU Library
17	General Public License'' may be included in a translation approved by
18	the Free Software Foundation instead of in the original English.
19
20	At your option, you may distribute verbatim and modified versions of
21	this document under the terms of the GNU General Public License,
22	excepting the clearly marked sections held under separate copyright.
23	The GNU General Public License follows.
24
25
26	GNU GENERAL PUBLIC LICENSE
27	Version 2, June 1991
28
29	Copyright (C) 1989, 1991 Free Software Foundation, Inc.
30	675 Mass Ave, Cambridge, MA 02139, USA
31	Everyone is permitted to copy and distribute verbatim copies
32	of this license document, but changing it is not allowed.
33
34	Preamble
35
36	The licenses for most software are designed to take away your
37	freedom to share and change it. By contrast, the GNU General Public
38	License is intended to guarantee your freedom to share and change free
39	software--to make sure the software is free for all its users. This
40	General Public License applies to most of the Free Software
41	Foundation's software and to any other program whose authors commit to
42	using it. (Some other Free Software Foundation software is covered by
43	the GNU Library General Public License instead.) You can apply it to
44	your programs, too.
45
46	When we speak of free software, we are referring to freedom, not
47	price. Our General Public Licenses are designed to make sure that you
48	have the freedom to distribute copies of free software (and charge for
49	this service if you wish), that you receive source code or can get it
50	if you want it, that you can change the software or use pieces of it
51	in new free programs; and that you know you can do these things.
52
53	To protect your rights, we need to make restrictions that forbid
54	anyone to deny you these rights or to ask you to surrender the rights.
55	These restrictions translate to certain responsibilities for you if you
56	distribute copies of the software, or if you modify it.
57
58	For example, if you distribute copies of such a program, whether
59	gratis or for a fee, you must give the recipients all the rights that
60	you have. You must make sure that they, too, receive or can get the
61	source code. And you must show them these terms so they know their
62	rights.
63
64	We protect your rights with two steps: (1) copyright the software, and
65	(2) offer you this license which gives you legal permission to copy,
66	distribute and/or modify the software.
67
68	Also, for each author's protection and ours, we want to make certain
69	that everyone understands that there is no warranty for this free
70	software. If the software is modified by someone else and passed on, we
71	want its recipients to know that what they have is not the original, so
72	that any problems introduced by others will not reflect on the original
73	authors' reputations.
74
75	Finally, any free program is threatened constantly by software
76	patents. We wish to avoid the danger that redistributors of a free
77	program will individually obtain patent licenses, in effect making the
78	program proprietary. To prevent this, we have made it clear that any
79	patent must be licensed for everyone's free use or not licensed at all.
80
81	The precise terms and conditions for copying, distribution and
82	modification follow.
83
84	GNU GENERAL PUBLIC LICENSE
85	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
86
87	0. This License applies to any program or other work which contains
88	a notice placed by the copyright holder saying it may be distributed
89	under the terms of this General Public License. The "Program", below,
90	refers to any such program or work, and a "work based on the Program"
91	means either the Program or any derivative work under copyright law:
92	that is to say, a work containing the Program or a portion of it,
93	either verbatim or with modifications and/or translated into another
94	language. (Hereinafter, translation is included without limitation in
95	the term "modification".) Each licensee is addressed as "you".
96
97	Activities other than copying, distribution and modification are not
98	covered by this License; they are outside its scope. The act of
99	running the Program is not restricted, and the output from the Program
100	is covered only if its contents constitute a work based on the
101	Program (independent of having been made by running the Program).
102	Whether that is true depends on what the Program does.
103
104	1. You may copy and distribute verbatim copies of the Program's
105	source code as you receive it, in any medium, provided that you
106	conspicuously and appropriately publish on each copy an appropriate
107	copyright notice and disclaimer of warranty; keep intact all the
108	notices that refer to this License and to the absence of any warranty;
109	and give any other recipients of the Program a copy of this License
110	along with the Program.
111
112	You may charge a fee for the physical act of transferring a copy, and
113	you may at your option offer warranty protection in exchange for a fee.
114
115	2. You may modify your copy or copies of the Program or any portion
116	of it, thus forming a work based on the Program, and copy and
117	distribute such modifications or work under the terms of Section 1
118	above, provided that you also meet all of these conditions:
119
120	a) You must cause the modified files to carry prominent notices
121	stating that you changed the files and the date of any change.
122
123	b) You must cause any work that you distribute or publish, that in
124	whole or in part contains or is derived from the Program or any
125	part thereof, to be licensed as a whole at no charge to all third
126	parties under the terms of this License.
127
128	c) If the modified program normally reads commands interactively
129	when run, you must cause it, when started running for such
130	interactive use in the most ordinary way, to print or display an
131	announcement including an appropriate copyright notice and a
132	notice that there is no warranty (or else, saying that you provide
133	a warranty) and that users may redistribute the program under
134	these conditions, and telling the user how to view a copy of this
135	License. (Exception: if the Program itself is interactive but
136	does not normally print such an announcement, your work based on
137	the Program is not required to print an announcement.)
138
139	These requirements apply to the modified work as a whole. If
140	identifiable sections of that work are not derived from the Program,
141	and can be reasonably considered independent and separate works in
142	themselves, then this License, and its terms, do not apply to those
143	sections when you distribute them as separate works. But when you
144	distribute the same sections as part of a whole which is a work based
145	on the Program, the distribution of the whole must be on the terms of
146	this License, whose permissions for other licensees extend to the
147	entire whole, and thus to each and every part regardless of who wrote it.
148
149	Thus, it is not the intent of this section to claim rights or contest
150	your rights to work written entirely by you; rather, the intent is to
151	exercise the right to control the distribution of derivative or
152	collective works based on the Program.
153
154	In addition, mere aggregation of another work not based on the Program
155	with the Program (or with a work based on the Program) on a volume of
156	a storage or distribution medium does not bring the other work under
157	the scope of this License.
158
159	3. You may copy and distribute the Program (or a work based on it,
160	under Section 2) in object code or executable form under the terms of
161	Sections 1 and 2 above provided that you also do one of the following:
162
163	a) Accompany it with the complete corresponding machine-readable
164	source code, which must be distributed under the terms of Sections
165	1 and 2 above on a medium customarily used for software interchange; or,
166
167	b) Accompany it with a written offer, valid for at least three
168	years, to give any third party, for a charge no more than your
169	cost of physically performing source distribution, a complete
170	machine-readable copy of the corresponding source code, to be
171	distributed under the terms of Sections 1 and 2 above on a medium
172	customarily used for software interchange; or,
173
174	c) Accompany it with the information you received as to the offer
175	to distribute corresponding source code. (This alternative is
176	allowed only for noncommercial distribution and only if you
177	received the program in object code or executable form with such
178	an offer, in accord with Subsection b above.)
179
180	The source code for a work means the preferred form of the work for
181	making modifications to it. For an executable work, complete source
182	code means all the source code for all modules it contains, plus any
183	associated interface definition files, plus the scripts used to
184	control compilation and installation of the executable. However, as a
185	special exception, the source code distributed need not include
186	anything that is normally distributed (in either source or binary
187	form) with the major components (compiler, kernel, and so on) of the
188	operating system on which the executable runs, unless that component
189	itself accompanies the executable.
190
191	If distribution of executable or object code is made by offering
192	access to copy from a designated place, then offering equivalent
193	access to copy the source code from the same place counts as
194	distribution of the source code, even though third parties are not
195	compelled to copy the source along with the object code.
196
197	4. You may not copy, modify, sublicense, or distribute the Program
198	except as expressly provided under this License. Any attempt
199	otherwise to copy, modify, sublicense or distribute the Program is
200	void, and will automatically terminate your rights under this License.
201	However, parties who have received copies, or rights, from you under
202	this License will not have their licenses terminated so long as such
203	parties remain in full compliance.
204
205	5. You are not required to accept this License, since you have not
206	signed it. However, nothing else grants you permission to modify or
207	distribute the Program or its derivative works. These actions are
208	prohibited by law if you do not accept this License. Therefore, by
209	modifying or distributing the Program (or any work based on the
210	Program), you indicate your acceptance of this License to do so, and
211	all its terms and conditions for copying, distributing or modifying
212	the Program or works based on it.
213
214	6. Each time you redistribute the Program (or any work based on the
215	Program), the recipient automatically receives a license from the
216	original licensor to copy, distribute or modify the Program subject to
217	these terms and conditions. You may not impose any further
218	restrictions on the recipients' exercise of the rights granted herein.
219	You are not responsible for enforcing compliance by third parties to
220	this License.
221
222	7. If, as a consequence of a court judgment or allegation of patent
223	infringement or for any other reason (not limited to patent issues),
224	conditions are imposed on you (whether by court order, agreement or
225	otherwise) that contradict the conditions of this License, they do not
226	excuse you from the conditions of this License. If you cannot
227	distribute so as to satisfy simultaneously your obligations under this
228	License and any other pertinent obligations, then as a consequence you
229	may not distribute the Program at all. For example, if a patent
230	license would not permit royalty-free redistribution of the Program by
231	all those who receive copies directly or indirectly through you, then
232	the only way you could satisfy both it and this License would be to
233	refrain entirely from distribution of the Program.
234
235	If any portion of this section is held invalid or unenforceable under
236	any particular circumstance, the balance of the section is intended to
237	apply and the section as a whole is intended to apply in other
238	circumstances.
239
240	It is not the purpose of this section to induce you to infringe any
241	patents or other property right claims or to contest validity of any
242	such claims; this section has the sole purpose of protecting the
243	integrity of the free software distribution system, which is
244	implemented by public license practices. Many people have made
245	generous contributions to the wide range of software distributed
246	through that system in reliance on consistent application of that
247	system; it is up to the author/donor to decide if he or she is willing
248	to distribute software through any other system and a licensee cannot
249	impose that choice.
250
251	This section is intended to make thoroughly clear what is believed to
252	be a consequence of the rest of this License.
253
254	8. If the distribution and/or use of the Program is restricted in
255	certain countries either by patents or by copyrighted interfaces, the
256	original copyright holder who places the Program under this License
257	may add an explicit geographical distribution limitation excluding
258	those countries, so that distribution is permitted only in or among
259	countries not thus excluded. In such case, this License incorporates
260	the limitation as if written in the body of this License.
261
262	9. The Free Software Foundation may publish revised and/or new versions
263	of the General Public License from time to time. Such new versions will
264	be similar in spirit to the present version, but may differ in detail to
265	address new problems or concerns.
266
267	Each version is given a distinguishing version number. If the Program
268	specifies a version number of this License which applies to it and "any
269	later version", you have the option of following the terms and conditions
270	either of that version or of any later version published by the Free
271	Software Foundation. If the Program does not specify a version number of
272	this License, you may choose any version ever published by the Free Software
273	Foundation.
274
275	10. If you wish to incorporate parts of the Program into other free
276	programs whose distribution conditions are different, write to the author
277	to ask for permission. For software which is copyrighted by the Free
278	Software Foundation, write to the Free Software Foundation; we sometimes
279	make exceptions for this. Our decision will be guided by the two goals
280	of preserving the free status of all derivatives of our free software and
281	of promoting the sharing and reuse of software generally.
282
283	NO WARRANTY
284
285	11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
286	FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
287	OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
288	PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
289	OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
290	MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
291	TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
292	PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
293	REPAIR OR CORRECTION.
294
295	12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
296	WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
297	REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
298	INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
299	OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
300	TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
301	YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
302	PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
303	POSSIBILITY OF SUCH DAMAGES.
304
305	END OF TERMS AND CONDITIONS
306
307	How to Apply These Terms to Your New Programs
308
309	If you develop a new program, and you want it to be of the greatest
310	possible use to the public, the best way to achieve this is to make it
311	free software which everyone can redistribute and change under these terms.
312
313	To do so, attach the following notices to the program. It is safest
314	to attach them to the start of each source file to most effectively
315	convey the exclusion of warranty; and each file should have at least
316	the "copyright" line and a pointer to where the full notice is found.
317
318	<one line to give the program's name and a brief idea of what it does.>
319	Copyright (C) 19yy <name of author>
320
321	This program is free software; you can redistribute it and/or modify
322	it under the terms of the GNU General Public License as published by
323	the Free Software Foundation; either version 2 of the License, or
324	(at your option) any later version.
325
326	This program is distributed in the hope that it will be useful,
327	but WITHOUT ANY WARRANTY; without even the implied warranty of
328	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
329	GNU General Public License for more details.
330
331	You should have received a copy of the GNU General Public License
332	along with this program; if not, write to the Free Software
333	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
334
335	Also add information on how to contact you by electronic and paper mail.
336
337	If the program is interactive, make it output a short notice like this
338	when it starts in an interactive mode:
339
340	Gnomovision version 69, Copyright (C) 19yy name of author
341	Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
342	This is free software, and you are welcome to redistribute it
343	under certain conditions; type `show c' for details.
344
345	The hypothetical commands `show w' and `show c' should show the appropriate
346	parts of the General Public License. Of course, the commands you use may
347	be called something other than `show w' and `show c'; they could even be
348	mouse-clicks or menu items--whatever suits your program.
349
350	You should also get your employer (if you work as a programmer) or your
351	school, if any, to sign a "copyright disclaimer" for the program, if
352	necessary. Here is a sample; alter the names:
353
354	Yoyodyne, Inc., hereby disclaims all copyright interest in the program
355	`Gnomovision' (which makes passes at compilers) written by James Hacker.
356
357	<signature of Ty Coon>, 1 April 1989
358	Ty Coon, President of Vice
359
360	This General Public License does not permit incorporating your program into
361	proprietary programs. If your program is a subroutine library, you may
362	consider it more useful to permit linking proprietary applications with the
363	library. If this is what you want to do, use the GNU Library General
364	Public License instead of this License.