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authorSimeon Simeonov2018-02-26 11:23:00 +0100
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1<?xml version='1.0' encoding='UTF-8'?>
2<appendix id="sylpheed-faq-4">
3 <appendixinfo>
4 <title>GNU Free Documentation License</title>
5 <pubdate>Version 1.2, November 2002</pubdate>
6 <copyright>
7 <year>2000,2001,2002</year>
8 <holder>Free Software Foundation, Inc.</holder>
9 </copyright>
10 <legalnotice id="gfdl-legalnotice">
11 <para><address>Free Software Foundation, Inc. <street>51 Franklin St, Fifth Floor</street>, <city>Boston</city>, <state>MA</state><postcode>02110-1301</postcode><country>USA</country></address></para>
12 <para>Everyone is permitted to copy and distribute verbatim copies
13 of this license document, but changing it is not allowed.</para>
14 </legalnotice>
15 <releaseinfo>Version 1.2, November 2002</releaseinfo>
16 </appendixinfo>
17 <title>GNU Free Documentation License</title>
18 <section id="gfdl-0">
19 <title>PREAMBLE</title>
20 <para>The purpose of this License is to make a manual, textbook, or
21other functional and useful document &quot;free&quot; in the sense of freedom: to
22assure everyone the effective freedom to copy and redistribute it, with
23or without modifying it, either commercially or noncommercially.
24Secondarily, this License preserves for the author and publisher a way
25to get credit for their work, while not being considered responsible for
26modifications made by others.</para>
27 <para>This License is a kind of &quot;copyleft&quot;, which means that derivative
28works of the document must themselves be free in the same sense. It
29complements the GNU General Public License, which is a copyleft license
30designed for free software.</para>
31 <para>We have designed this License in order to use it for manuals for
32free software, because free software needs free documentation: a free
33program should come with manuals providing the same freedoms that the
34software does. But this License is not limited to software manuals; it
35can be used for any textual work, regardless of subject matter or
36whether it is published as a printed book. We recommend this License
37principally for works whose purpose is instruction or reference.</para>
38 </section>
39 <section id="gfdl-1">
40 <title>APPLICABILITY AND DEFINITIONS</title>
41 <para id="gfdl-doc">This License applies to any manual or other work, in
42any medium, that contains a notice placed by the copyright holder saying
43it can be distributed under the terms of this License. Such a notice
44grants a world-wide, royalty-free license, unlimited in duration, to use
45that work under the conditions stated herein. The &quot;Document&quot;, below,
46refers to any such manual or work. Any member of the public is a
47licensee, and is addressed as &quot;you&quot;. You accept the license if you
48copy, modify or distribute the work in a way requiring permission under
49copyright law.</para>
50 <para id="gfdl-mod-ver">A &quot;Modified Version&quot; of the Document means any
51work containing the Document or a portion of it, either copied verbatim,
52or with modifications and/or translated into another language.</para>
53 <para id="gfdl-secnd-sect">A &quot;Secondary Section&quot; is a named appendix or
54a front-matter section of the Document that deals exclusively with the
55relationship of the publishers or authors of the Document to the
56Document&apos;s overall subject (or to related matters) and contains nothing
57that could fall directly within that overall subject. (Thus, if the
58Document is in part a textbook of mathematics, a Secondary Section may
59not explain any mathematics.) The relationship could be a matter of
60historical connection with the subject or with related matters, or of
61legal, commercial, philosophical, ethical or political position
62regarding them.</para>
63 <para id="gfdl-inv-sect">The &quot;Invariant Sections&quot; are certain Secondary
64Sections whose titles are designated, as being those of Invariant
65Sections, in the notice that says that the Document is released under
66this License. If a section does not fit the above definition of
67Secondary then it is not allowed to be designated as Invariant. The
68Document may contain zero Invariant Sections. If the Document does not
69identify any Invariant Sections then there are none.</para>
70 <para id="gfdl-cov-text">The &quot;Cover Texts&quot; are certain short passages of
71text that are listed, as Front-Cover Texts or Back-Cover Texts, in the
72notice that says that the Document is released under this License. A
73Front-Cover Text may be at most 5 words, and a Back-Cover Text may be at
74most 25 words.</para>
75 <para id="gfdl-transparent">A &quot;Transparent&quot; copy of the Document means a
76machine-readable copy, represented in a format whose specification is
77available to the general public, that is suitable for revising the
78document straightforwardly with generic text editors or (for images
79composed of pixels) generic paint programs or (for drawings) some widely
80available drawing editor, and that is suitable for input to text
81formatters or for automatic translation to a variety of formats suitable
82for input to text formatters. A copy made in an otherwise Transparent
83file format whose markup, or absence of markup, has been arranged to
84thwart or discourage subsequent modification by readers is not
85Transparent. An image format is not Transparent if used for any
86substantial amount of text. A copy that is not &quot;Transparent&quot; is called
87&quot;Opaque&quot;.</para>
88 <para>Examples of suitable formats for Transparent copies include plain
89ASCII without markup, Texinfo input format, LaTeX input format, SGML or
90XML using a publicly available DTD, and standard-conforming simple HTML,
91PostScript or PDF designed for human modification. Examples of
92transparent image formats include PNG, XCF and JPG. Opaque formats
93include proprietary formats that can be read and edited only by
94proprietary word processors, SGML or XML for which the DTD and/or
95processing tools are not generally available, and the machine-generated
96HTML, PostScript or PDF produced by some word processors for output
97purposes only.</para>
98 <para id="gfdl-title-page">The &quot;Title Page&quot; means, for a printed book,
99the title page itself, plus such following pages as are needed to hold,
100legibly, the material this License requires to appear in the title page.
101For works in formats which do not have any title page as such, &quot;Title
102Page&quot; means the text near the most prominent appearance of the work&apos;s
103title, preceding the beginning of the body of the text.</para>
104 <para id="gfdl-entitled">A section &quot;Entitled XYZ&quot; means a named subunit
105of the Document whose title either is precisely XYZ or contains XYZ in
106parentheses following text that translates XYZ in another language.
107(Here XYZ stands for a specific section name mentioned below, such as
108&quot;Acknowledgements&quot;, &quot;Dedications&quot;, &quot;Endorsements&quot;, or &quot;History&quot;.) To
109&quot;Preserve the Title&quot; of such a section when you modify the Document
110means that it remains a section &quot;Entitled XYZ&quot; according to this
111definition.</para>
112 <para>The Document may include Warranty Disclaimers next to the notice
113which states that this License applies to the Document. These Warranty
114Disclaimers are considered to be included by reference in this License,
115but only as regards disclaiming warranties: any other implication that
116these Warranty Disclaimers may have is void and has no effect on the
117meaning of this License.</para>
118 </section>
119 <section id="gfdl-2">
120 <title>VERBATIM COPYING</title>
121 <para>You may copy and distribute the Document in any medium, either
122commercially or noncommercially, provided that this License, the
123copyright notices, and the license notice saying this License applies to
124the Document are reproduced in all copies, and that you add no other
125conditions whatsoever to those of this License. You may not use
126technical measures to obstruct or control the reading or further copying
127of the copies you make or distribute. However, you may accept
128compensation in exchange for copies. If you distribute a large enough
129number of copies you must also follow the conditions in section 3.
130</para>
131 <para>You may also lend copies, under the same conditions stated above,
132and you may publicly display copies.</para>
133 </section>
134 <section id="gfdl-3">
135 <title>COPYING IN QUANTITY</title>
136 <para>If you publish printed copies (or copies in media that commonly
137have printed covers) of the Document, numbering more than 100, and the
138Document&apos;s license notice requires Cover Texts, you must enclose the
139copies in covers that carry, clearly and legibly, all these Cover Texts:
140Front-Cover Texts on the front cover, and Back-Cover Texts on the back
141cover. Both covers must also clearly and legibly identify you as the
142publisher of these copies. The front cover must present the full title
143with all words of the title equally prominent and visible. You may add
144other material on the covers in addition. Copying with changes limited
145to the covers, as long as they preserve the title of the Document and
146satisfy these conditions, can be treated as verbatim copying in other
147respects.</para>
148 <para>If the required texts for either cover are too voluminous to fit
149legibly, you should put the first ones listed (as many as fit
150reasonably) on the actual cover, and continue the rest onto adjacent
151pages.</para>
152 <para>If you publish or distribute Opaque copies of the Document
153numbering more than 100, you must either include a machine-readable
154Transparent copy along with each Opaque copy, or state in or with each
155Opaque copy a computer-network location from which the general
156network-using public has access to download using public-standard
157network protocols a complete Transparent copy of the Document, free of
158added material. If you use the latter option, you must take reasonably
159prudent steps, when you begin distribution of Opaque copies in quantity,
160to ensure that this Transparent copy will remain thus accessible at the
161stated location until at least one year after the last time you
162distribute an Opaque copy (directly or through your agents or retailers)
163of that edition to the public.</para>
164 <para>It is requested, but not required, that you contact the authors of
165the Document well before redistributing any large number of copies, to
166give them a chance to provide you with an updated version of the
167Document.</para>
168 </section>
169 <section id="gfdl-4">
170 <title>MODIFICATIONS</title>
171 <para>You may copy and distribute a Modified Version of the Document
172under the conditions of sections 2 and 3 above, provided that you
173release the Modified Version under precisely this License, with the
174Modified Version filling the role of the Document, thus licensing
175distribution and modification of the Modified Version to whoever
176possesses a copy of it. In addition, you must do these things in the
177Modified Version:</para>
178 <orderedlist numeration="upperalpha" id="gfdl-modif-cond">
179 <title>GNU FDL Modification Conditions</title>
180 <listitem>
181 <simpara>Use in the Title Page (and on the covers, if any) a title distinct from that of the Document, and from those of previous versions (which should, if there were any, be listed in the History section of the Document). You may use the same title as a previous version if the original publisher of that version gives permission. </simpara>
182 </listitem>
183 <listitem>
184 <simpara>List on the Title Page, as authors, one or more persons or entities responsible for authorship of the modifications in the Modified Version, together with at least five of the principal authors of the Document (all of its principal authors, if it has fewer than five), unless they release you from this requirement. </simpara>
185 </listitem>
186 <listitem>
187 <simpara>State on the Title page the name of the publisher of the Modified Version, as the publisher.</simpara>
188 </listitem>
189 <listitem>
190 <simpara>Preserve all the copyright notices of the Document. </simpara>
191 </listitem>
192 <listitem>
193 <simpara>Add an appropriate copyright notice for your modifications adjacent to the other copyright notices. </simpara>
194 </listitem>
195 <listitem>
196 <simpara>Include, immediately after the copyright notices, a license notice giving the public permission to use the Modified Version under the terms of this License, in the form shown in the <link linkend="gfdl-addendum">Addendum</link> below. </simpara>
197 </listitem>
198 <listitem>
199 <simpara>Preserve in that license notice the full lists of Invariant Sections and required Cover Texts given in the Document&apos;s license notice.</simpara>
200 </listitem>
201 <listitem>
202 <simpara>Include an unaltered copy of this License. </simpara>
203 </listitem>
204 <listitem>
205 <simpara>Preserve the section Entitled &quot;History&quot;, Preserve its Title, and add to it an item stating at least the title, year, new authors, and publisher of the Modified Version as given on the Title Page. If there is no section Entitled &quot;History&quot; in the Document, create one stating the title, year, authors, and publisher of the Document as given on its Title Page, then add an item describing the Modified Version as stated in the previous sentence. </simpara>
206 </listitem>
207 <listitem>
208 <simpara>Preserve the network location, if any, given in the Document for public access to a Transparent copy of the Document, and likewise the network locations given in the Document for previous versions it was based on. These may be placed in the &quot;History&quot; section. You may omit a network location for a work that was published at least four years before the Document itself, or if the original publisher of the version it refers to gives permission. </simpara>
209 </listitem>
210 <listitem>
211 <simpara>For any section Entitled &quot;Acknowledgements&quot; or &quot;Dedications&quot;, Preserve the Title of the section, and preserve in the section all the substance and tone of each of the contributor acknowledgements and/or dedications given therein. </simpara>
212 </listitem>
213 <listitem>
214 <simpara>Preserve all the Invariant Sections of the Document, unaltered in their text and in their titles. Section numbers or the equivalent are not considered part of the section titles. </simpara>
215 </listitem>
216 <listitem>
217 <simpara>Delete any section Entitled &quot;Endorsements&quot;. Such a section may not be included in the Modified Version. </simpara>
218 </listitem>
219 <listitem>
220 <simpara>Do not retitle any existing section to be Entitled &quot;Endorsements&quot; or to conflict in title with any Invariant Section. </simpara>
221 </listitem>
222 <listitem>
223 <simpara>Preserve any Warranty Disclaimers. </simpara>
224 </listitem>
225 </orderedlist>
226 <para>If the Modified Version includes new front-matter sections or
227appendices that qualify as Secondary Sections and contain no material
228copied from the Document, you may at your option designate some or all
229of these sections as invariant. To do this, add their titles to the
230list of Invariant Sections in the Modified Version&apos;s license notice.
231These titles must be distinct from any other section titles.</para>
232 <para>You may add a section Entitled &quot;Endorsements&quot;, provided it
233contains nothing but endorsements of your Modified Version by various
234parties--for example, statements of peer review or that the text has
235been approved by an organization as the authoritative definition of a
236standard.</para>
237 <para>You may add a passage of up to five words as a Front-Cover Text,
238and a passage of up to 25 words as a Back-Cover Text, to the end of the
239list of Cover Texts in the Modified Version. Only one passage of
240Front-Cover Text and one of Back-Cover Text may be added by (or through
241arrangements made by) any one entity. If the Document already includes
242a cover text for the same cover, previously added by you or by
243arrangement made by the same entity you are acting on behalf of, you may
244not add another; but you may replace the old one, on explicit permission
245from the previous publisher that added the old one.</para>
246 <para>The author(s) and publisher(s) of the Document do not by this
247License give permission to use their names for publicity for or to
248assert or imply endorsement of any Modified Version.</para>
249 </section>
250 <section id="gfdl-5">
251 <title>COMBINING DOCUMENTS</title>
252 <para>You may combine the Document with other documents released under
253this License, under the terms defined in <link linkend="gfdl-4">section 4</link> above for modified versions, provided that you include in the
254combination all of the Invariant Sections of all of the original
255documents, unmodified, and list them all as Invariant Sections of your
256combined work in its license notice, and that you preserve all their
257Warranty Disclaimers.</para>
258 <para>The combined work need only contain one copy of this License, and
259multiple identical Invariant Sections may be replaced with a single
260copy. If there are multiple Invariant Sections with the same name but
261different contents, make the title of each such section unique by adding
262at the end of it, in parentheses, the name of the original author or
263publisher of that section if known, or else a unique number. Make the
264same adjustment to the section titles in the list of Invariant Sections
265in the license notice of the combined work.</para>
266 <para>In the combination, you must combine any sections Entitled
267&quot;History&quot; in the various original documents, forming one section
268Entitled &quot;History&quot;; likewise combine any sections Entitled
269&quot;Acknowledgements&quot;, and any sections Entitled &quot;Dedications&quot;. You must
270delete all sections Entitled &quot;Endorsements&quot;.</para>
271 </section>
272 <section id="gfdl-6">
273 <title>COLLECTIONS OF DOCUMENTS</title>
274 <para>You may make a collection consisting of the Document and other
275documents released under this License, and replace the individual copies
276of this License in the various documents with a single copy that is
277included in the collection, provided that you follow the rules of this
278License for verbatim copying of each of the documents in all other
279respects.</para>
280 <para>You may extract a single document from such a collection, and
281distribute it individually under this License, provided you insert a
282copy of this License into the extracted document, and follow this
283License in all other respects regarding verbatim copying of that
284document.</para>
285 </section>
286 <section id="gfdl-7">
287 <title>AGGREGATION WITH INDEPENDENT WORKS</title>
288 <para>A compilation of the Document or its derivatives with other
289separate and independent documents or works, in or on a volume of a
290storage or distribution medium, is called an &quot;aggregate&quot; if the
291copyright resulting from the compilation is not used to limit the legal
292rights of the compilation&apos;s users beyond what the individual works
293permit. When the Document is included in an aggregate, this License does
294not apply to the other works in the aggregate which are not themselves
295derivative works of the Document.</para>
296 <para>If the Cover Text requirement of section 3 is applicable to these
297copies of the Document, then if the Document is less than one half of
298the entire aggregate, the Document&apos;s Cover Texts may be placed on covers
299that bracket the Document within the aggregate, or the electronic
300equivalent of covers if the Document is in electronic form. Otherwise
301they must appear on printed covers that bracket the whole
302aggregate.</para>
303 </section>
304 <section id="gfdl-8">
305 <title>TRANSLATION</title>
306 <para>Translation is considered a kind of modification, so you may
307distribute translations of the Document under the terms of section 4.
308Replacing Invariant Sections with translations requires special
309permission from their copyright holders, but you may include
310translations of some or all Invariant Sections in addition to the
311original versions of these Invariant Sections. You may include a
312translation of this License, and all the license notices in the
313Document, and any Warranty Disclaimers, provided that you also include
314the original English version of this License and the original versions
315of those notices and disclaimers. In case of a disagreement between the
316translation and the original version of this License or a notice or
317disclaimer, the original version will prevail.</para>
318 <para>If a section in the Document is Entitled &quot;Acknowledgements&quot;,
319&quot;Dedications&quot;, or &quot;History&quot;, the requirement (section 4) to Preserve its
320Title (section 1) will typically require changing the actual
321title.</para>
322 </section>
323 <section id="gfdl-9">
324 <title>TERMINATION</title>
325 <para>You may not copy, modify, sublicense, or distribute the Document
326except as expressly provided for under this License. Any other attempt
327to copy, modify, sublicense or distribute the Document is void, and will
328automatically terminate your rights under this License. However,
329parties who have received copies, or rights, from you under this License
330will not have their licenses terminated so long as such parties remain
331in full compliance.</para>
332 </section>
333 <section id="gfdl-10">
334 <title>FUTURE REVISIONS OF THIS LICENSE</title>
335 <para>The Free Software Foundation may publish new, revised versions of
336the GNU Free Documentation License from time to time. Such new versions
337will be similar in spirit to the present version, but may differ in
338detail to address new problems or concerns. See
339http://www.gnu.org/copyleft/.</para>
340 <para>Each version of the License is given a distinguishing version
341number. If the Document specifies that a particular numbered version of
342this License &quot;or any later version&quot; applies to it, you have the option
343of following the terms and conditions either of that specified version
344or of any later version that has been published (not as a draft) by the
345Free Software Foundation. If the Document does not specify a version
346number of this License, you may choose any version ever published (not
347as a draft) by the Free Software Foundation.</para>
348 </section>
349 <section id="gfdl-addendum">
350 <title>ADDENDUM: How to use this License for your documents</title>
351 <para>To use this License in a document you have written, include a copy
352of the License in the document and put the following copyright and
353license notices just after the title page:</para>
354 <blockquote id="copyright-sample">
355 <title>Sample Invariant Sections list</title>
356 <para>
357 Copyright (c) YEAR YOUR NAME.
358 Permission is granted to copy, distribute and/or modify this document
359 under the terms of the GNU Free Documentation License, Version 1.2
360 or any later version published by the Free Software Foundation;
361 with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
362 A copy of the license is included in the section entitled &quot;GNU
363 Free Documentation License&quot;.
364</para>
365 </blockquote>
366 <para>If you have Invariant Sections, Front-Cover Texts and Back-Cover
367Texts, replace the &quot;with...Texts.&quot; line with this:</para>
368 <blockquote id="inv-cover-sample">
369 <title>Sample Invariant Sections list</title>
370 <para>
371 with the Invariant Sections being LIST THEIR TITLES, with the
372 Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
373</para>
374 </blockquote>
375 <para>If you have Invariant Sections without Cover Texts, or some other
376combination of the three, merge those two alternatives to suit the
377situation.</para>
378 <para>If your document contains nontrivial examples of program code, we
379recommend releasing these examples in parallel under your choice of free
380software license, such as the GNU General Public License, to permit
381their use in free software.</para>
382 </section>
383</appendix>