Add documentation framework.

* Makefile.am (SUBDIRS): Add doc.
* configure.ac (AC_CONFIG_FILES): Add doc/Makefile.

* doc/.gitignore: New file.
* doc/Config: New file.
* doc/Makefile.am: New file.
* doc/fdl.texi: New file.
* doc/mastermenu.el: New file.
* doc/smap.texi: New file.
* doc/sockmap.texi: New file.
* doc/untabify.el: New file.
* doc/gendocs_template: New file.

11 files changed, 1360 insertions, 2 deletions

diff --git a/Makefile.am b/Makefile.am
index 1f4c37d..b91743b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 ACLOCAL_AMFLAGS = -I m4 -I gint
-SUBDIRS = libltdl include lib src gint modules
+SUBDIRS = libltdl include lib src gint modules doc
 
 .PHONY: ChangeLog
 ChangeLog: 
diff --git a/configure.ac b/configure.ac
index 6403669..3b0ac68 100644
--- a/configure.ac
+++ b/configure.ac
@@ -196,6 +196,6 @@ AC_CONFIG_FILES([Makefile
 	         modules/echo/Makefile
 	         modules/mailutils/Makefile
 	         modules/guile/Makefile
-		 ])
+		 doc/Makefile])
 AC_OUTPUT
 
diff --git a/doc/.gitignore b/doc/.gitignore
new file mode 100644
index 0000000..5d01164
--- /dev/null
+++ b/doc/.gitignore
@@ -0,0 +1,22 @@
+Makefile
+Makefile.in
+smap.info*
+stamp-vti
+version.texi
+smap.aux
+smap.cp
+smap.cps
+smap.dvi
+smap.fl
+smap.fn
+smap.kw
+smap.ky
+smap.log
+smap.mt
+smap.op
+smap.pg
+smap.pr
+smap.ps
+smap.toc
+smap.tp
+smap.vr
diff --git a/doc/Config b/doc/Config
new file mode 100644
index 0000000..ecd455f
--- /dev/null
+++ b/doc/Config
@@ -0,0 +1,365 @@
+# Texi2html configuration for Smap documentation. -*- perl -*-
+# Copyright (C) 2009, 2010 Sergey Poznyakoff
+#
+# Smap 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 3, or (at your option)
+# any later version.
+#
+# Smap 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 Smap.  If not, see <http://www.gnu.org/licenses/>.
+
+$top_html_dir="/software/smap";
+#$top_html_dir="/smap";
+$graphics_dir="$top_html_dir/graphics";
+
+## texi2html configuration
+
+# Show TOC in place of the @contents directive.
+$INLINE_CONTENTS = 1;
+# Do not show Texinfo menus.
+$SHOW_MENU = 0;
+# Inhibit output of CSS lines in page headers.
+$CSS_LINES='';
+# Print footnotes at the end of each file (if the document is split).
+$SEPARATED_FOOTNOTES = 0;
+
+$BODYTEXT = "";
+
+$EXTRA_HEAD="\
+  <link rev=\"made\" href=\"mailto:gray@gnu.org.ua\">\
+  <link rel=\"stylesheet\" type=\"text/css\" href=\"${top_html_dir}/gray.css\">\
+  <link rel=\"stylesheet\" type=\"text/css\" href=\"${top_html_dir}/texi.css\">\
+  <link rel=\"icon\" type=\"image/png\" href=\"/graphics/gnu-head-icon.png\">";
+
+$AFTER_BODY_OPEN=qq{
+<!--#include virtual=\"${top_html_dir}/inc/header.html\" -->
+<ul class='tabs'>
+  <li><a href="${top_html_dir}/smap.html">Main</a></li>
+  <li><a href="${top_html_dir}/download.html">Downloads</a></li>
+  <li><a class="active" href="${top_html_dir}/manual.html">Documentation</a></li>
+</ul>
+};
+
+$PRE_BODY_CLOSE="Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.";
+
+$format_map{'multitable'}='table class="multitable"';
+
+$SMALL_RULE = '';
+$DEFAULT_RULE = '';
+$MIDDLE_RULE = '';
+# This is output at the end of a section.
+$BIG_RULE = '';
+
+# Use navigation icons
+$ICONS = 1;
+%ACTIVE_ICONS =
+    (
+     'Top',         "$graphics_dir/top.png",
+     'Contents',    "$graphics_dir/ctx.png",
+     'Overview',    '',
+     'Index',       "$graphics_dir/idx.png",
+     'This',        '',
+     'Back',        "$graphics_dir/left.png",
+     'FastBack',    "$graphics_dir/bwd.png",
+     'Prev',        "",
+     'Up',          "$graphics_dir/up.png",
+     'Next',        "$graphics_dir/right.png",
+     'NodeUp',      "$graphics_dir/left.png",
+     'NodeNext',    "$graphics_dir/up.png",
+     'NodePrev',    "$graphics_dir/right.png",
+     'Following',   "$graphics_dir/right.png",
+     'Forward',     "$graphics_dir/right.png",
+     'FastForward', "$graphics_dir/fwd.png",
+     'About' ,      '',
+     'First',       '',
+     'Last',        '',
+     ' ',           ''
+    );
+
+@SECTION_BUTTONS =
+    (
+     \&gray_document_title,
+     \&gray_sec_ref,
+     'Back', 'Forward',
+     \&gray_chap_ref, 'FastBack', 'Up', 'FastForward',
+     \&gray_doc_ref,
+     'Contents', 'Index',
+     ' ','About',
+    );
+
+@SECTION_FOOTER_BUTTONS = @SECTION_BUTTONS;
+@NODE_FOOTER_BUTTONS = @SECTION_BUTTONS;
+
+# buttons for misc stuff
+@MISC_BUTTONS = (
+    \&gray_document_title,
+    'Contents',
+    'Index',
+    ' ',
+    'About'
+    );
+
+
+$print_section = \&gray_print_section;
+$print_navigation = \&gray_print_navigation;
+$print_head_navigation = \&gray_print_head_navigation;
+$print_foot_navigation = \&gray_print_foot_navigation;
+$print_About	      = \&gray_print_About;
+$cell = \&gray_multitable_cell;
+$print_page_foot = \&gray_print_page_foot;
+
+sub gray_multitable_cell($$)
+{
+    my $text = shift;
+    my $row_macro = shift;
+
+    $text =~ s/<p>//;
+    $text =~ s/<\/p>//;
+    if ($row_macro eq 'headitem')
+    {
+	return '<th>' . $text . '</th>';
+    }
+    return '<td>' . $text . '</td>';
+}
+
+sub gray_print_About
+{
+    return &$print_misc(@_) if (!($SPLIT eq '') or $SECTION_NAVIGATION);
+}
+
+sub gray_split_status()
+{
+    if ($SPLIT eq '') {
+	return '';
+    } elsif ($SPLIT eq 'node') {
+	return ' <span class="splitstatus">(split by node)</span>';
+    } elsif ($SPLIT eq 'section') {
+	return ' <span class="splitstatus">(split by section)</span>';
+    } elsif ($SPLIT eq 'chapter') {
+	return ' <span class="splitstatus">(split by chapter)</span>';
+    }
+}
+
+sub gray_document_title($$)
+{
+    my $fh = shift;
+    my $vertical = shift;
+    my $status = gray_split_status();
+    print $fh qq{<td class="title">} . $Texi2HTML::THISDOC{title} . $status . ":</td>\n";
+}
+
+sub gray_node_ref($$)
+{
+    my $fh = shift;
+    my $vertical = shift;
+    print $fh qq{<span class="navtext">Node:</span>};
+}
+
+sub gray_sec_ref($$)
+{
+    my $fh = shift;
+    my $vertical = shift;
+    print $fh qq{<span class="navtext">Section:</span>};
+}
+
+sub gray_chap_ref($$)
+{
+    my $fh = shift;
+    my $vertical = shift;
+    print $fh qq{<span class="navtext">Chapter:</span>};
+}
+
+sub gray_doc_ref($$)
+{
+    my $fh = shift;
+    my $vertical = shift;
+    print $fh qq{<span class="navtext">Doc:</span>};
+}
+
+sub gray_print_navigation
+{
+    my $fh = shift;
+    my $buttons = shift;
+    my $vertical = shift;
+    my $spacing = 1;
+    my $class="nav";
+
+    print $fh qq{<table class="nav">\n};
+
+    print $fh "<tr>" unless $vertical;
+    for my $button (@$buttons)
+    {
+	if ($button =~ /^\@class=(.*)/) {
+	    $class = "$class $1";
+	    next;
+	}
+	print $fh "<tr>\n" if $vertical;
+	print $fh qq{<td class="$class">};
+
+	if (ref($button) eq 'CODE')
+	{
+	    &$button($fh, $vertical);
+	}
+	elsif (ref($button) eq 'SCALAR')
+	{
+	    print $fh "$$button" if defined($$button);
+	}
+	elsif (ref($button) eq 'ARRAY')
+	{
+	    my $text = $button->[1];
+	    my $button_href = $button->[0];
+	    # verify that $button_href is simple text and text is a reference
+	    if (defined($button_href) and !ref($button_href)
+	       and defined($text) and (ref($text) eq 'SCALAR') and defined($$text))
+	    {             # use given text
+		if ($Texi2HTML::HREF{$button_href})
+		{
+		  print $fh "" .
+			&$anchor('',
+				    $Texi2HTML::HREF{$button_href},
+				    $$text
+				   )
+				    ;
+		}
+		else
+		{
+		  print $fh $$text;
+		}
+	    }
+	}
+	elsif ($button eq ' ')
+	{                       # handle space button
+	    print $fh
+		($ICONS && $ACTIVE_ICONS{' '}) ?
+		    &$button_icon_img($BUTTONS_NAME{$button}, $ACTIVE_ICONS{' '}) :
+			$NAVIGATION_TEXT{' '};
+	    #next;
+	}
+	elsif ($Texi2HTML::HREF{$button})
+	{                       # button is active
+	    my $btitle = $BUTTONS_GOTO{$button} ?
+		'title="' . $BUTTONS_GOTO{$button} . '"' : '';
+	    if ($ICONS && $ACTIVE_ICONS{$button})
+	    {                   # use icon
+		print $fh '' .
+		    &$anchor('',
+			$Texi2HTML::HREF{$button},
+			&$button_icon_img($BUTTONS_NAME{$button},
+				   $ACTIVE_ICONS{$button},
+				   $Texi2HTML::SIMPLE_TEXT{$button}),
+			$btitle
+		      );
+	    }
+	    else
+	    {                   # use text
+		print $fh
+		    '' .
+			&$anchor('',
+				    $Texi2HTML::HREF{$button},
+				    $NAVIGATION_TEXT{$button},
+				    $btitle
+				   );
+	    }
+	}
+	else {                       # button is passive
+	    print $fh '<span class="passive">' .
+		($ICONS && $PASSIVE_ICONS{$button} ?
+		    &$button_icon_img($BUTTONS_NAME{$button},
+					  $PASSIVE_ICONS{$button},
+					  $Texi2HTML::SIMPLE_TEXT{$button}) :
+
+					  $NAVIGATION_TEXT{$button}) . '</span>';
+	}
+	print $fh "</td>\n";
+	print $fh "</tr>\n" if $vertical;
+	$class = "nav";
+    }
+    print $fh "</tr>" unless $vertical;
+    print $fh "</table>\n";
+}
+
+sub gray_print_head_navigation($$)
+{
+    my $fh = shift;
+    my $buttons = shift;
+
+    return if ($SPLIT eq '');
+    if ($VERTICAL_HEAD_NAVIGATION)
+    {
+	print $fh <<EOT;
+<table class='nav'>
+<tr>
+<td>
+EOT
+    }
+    main::print_lines($fh, $Texi2HTML::THIS_HEADER);
+    &$print_navigation($fh, $buttons, $VERTICAL_HEAD_NAVIGATION);
+    if ($VERTICAL_HEAD_NAVIGATION)
+    {
+	print $fh <<EOT;
+</td>
+<td>
+EOT
+    }
+}
+
+sub gray_print_foot_navigation
+{
+    my $fh = shift;
+
+    return if ($SPLIT eq '');
+    if ($VERTICAL_HEAD_NAVIGATION)
+    {
+	print $fh <<EOT;
+</td>
+</tr>
+</table>
+EOT
+    }
+}
+
+sub gray_print_page_foot($)
+{
+    my $fh = shift;
+    my $program_string = program_string();
+    print $fh <<EOT;
+<div class="copyright">
+$program_string
+EOT
+    if (defined($PRE_BODY_CLOSE) && $PRE_BODY_CLOSE) {
+	print $fh "<p>$PRE_BODY_CLOSE</p>";
+    }
+    print $fh <<EOT;
+</div>
+</body>
+</html>
+EOT
+}
+
+sub gray_print_section
+{
+    my $fh = shift;
+    my $first_in_page = shift;
+    my $previous_is_top = shift;
+    my $buttons = \@SECTION_BUTTONS;
+
+    if ($first_in_page) {
+	&$print_head_navigation($fh, $buttons)
+    } else {
+	main::print_lines($fh, $Texi2HTML::THIS_HEADER);
+    }
+    my $nw = main::print_lines($fh);
+    if (defined $SPLIT
+	and ($SPLIT eq 'node')) {
+	&$print_foot_navigation($fh);
+	print $fh "$SMALL_RULE\n";
+	&$print_navigation($fh, \@NODE_FOOTER_BUTTONS) if (!defined($WORDS_IN_PAGE) or (defined ($nw)
+				    and $nw >= $WORDS_IN_PAGE));
+    }
+}
diff --git a/doc/Makefile.am b/doc/Makefile.am
new file mode 100644
index 0000000..dcd824a
--- /dev/null
+++ b/doc/Makefile.am
@@ -0,0 +1,70 @@
+# This file is part of SMAP. 
+# Copyright (C) 2010 Sergey Poznyakoff
+#
+# 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 3, 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, see <http://www.gnu.org/licenses/>.
+
+info_TEXINFOS=smap.texi
+smap_TEXINFOS=\
+ fdl.texi\
+ sockmap.texi
+
+EXTRA_DIST = \
+ gendocs_template\
+ mastermenu.el\
+ untabify.el
+
+clean-local:
+	@rm -rf manual
+
+# Checking
+check-format:
+	@if test -n "`cat $(info_TEXINFOS) $(smap_TEXINFOS) | tr -d -c '\t'`"; then \
+		echo "Sources contain tabs; run make untabify"; \
+		false; \
+	fi
+
+all-check-docs: check-format
+
+check-docs: 
+	@$(MAKE) -k all-check-docs
+
+#
+
+master-menu:
+	$(AM_V_GEN)emacs -batch -l mastermenu.el -f make-master-menu $(info_TEXINFOS)
+
+untabify:
+	@emacs -batch -l untabify.el $(info_TEXINFOS) $(mailfromd_TEXINFOS)
+
+final: untabify master-menu
+
+MAKEINFOFLAGS=
+
+GENDOCS=gendocs.sh 
+
+TEXI2DVI=texi2dvi -t '@set $(RENDITION)' -E
+
+# Make sure you set TEXINPUTS.
+# TEXINPUTS=/usr/share/texmf/pdftex/plain/misc/ is ok for most distributions
+.PHONY: manual
+manual:
+	TEXINPUTS=$(srcdir):$(top_srcdir)/build-aux:$(TEXINPUTS) \
+	 MAKEINFO="$(MAKEINFO) $(MAKEINFOFLAGS)" \
+	 TEXI2DVI="$(TEXI2DVI) -t @finalout" \
+	 $(GENDOCS) --texi2html $(PACKAGE) '$(PACKAGE_NAME) manual'
+
+manual.tar.bz2: manual
+	tar cfj manual.tar.bz2 manual
+
+man-tar: manual.tar.bz2
diff --git a/doc/fdl.texi b/doc/fdl.texi
new file mode 100644
index 0000000..7da8738
--- /dev/null
+++ b/doc/fdl.texi
@@ -0,0 +1,449 @@
+@setfilename fdl.info
+@cindex FDL, GNU Free Documentation License
+@center Version 1.2, November 2002
+
+@display
+Copyright @copyright{} 2000,2001,2002 Free Software Foundation, Inc.
+59 Temple Place, Suite 330, Boston, MA  02111-1307, USA
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+@end display
+
+@enumerate 0
+@item
+PREAMBLE
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document @dfn{free} in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of ``copyleft'', which means that derivative
+works of the document must themselves be free in the same sense.  It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does.  But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book.  We recommend this License
+principally for works whose purpose is instruction or reference.
+
+@item
+APPLICABILITY AND DEFINITIONS
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License.  Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein.  The ``Document'', below,
+refers to any such manual or work.  Any member of the public is a
+licensee, and is addressed as ``you''.  You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A ``Modified Version'' of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A ``Secondary Section'' is a named appendix or a front-matter section
+of the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall
+subject (or to related matters) and contains nothing that could fall
+directly within that overall subject.  (Thus, if the Document is in
+part a textbook of mathematics, a Secondary Section may not explain
+any mathematics.)  The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The ``Invariant Sections'' are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License.  If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant.  The Document may contain zero
+Invariant Sections.  If the Document does not identify any Invariant
+Sections then there are none.
+
+The ``Cover Texts'' are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License.  A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A ``Transparent'' copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters.  A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text.  A copy that is not ``Transparent'' is called ``Opaque''.
+
+Examples of suitable formats for Transparent copies include plain
+@sc{ascii} without markup, Texinfo input format, La@TeX{} input
+format, @acronym{SGML} or @acronym{XML} using a publicly available
+@acronym{DTD}, and standard-conforming simple @acronym{HTML},
+PostScript or @acronym{PDF} designed for human modification.  Examples
+of transparent image formats include @acronym{PNG}, @acronym{XCF} and
+@acronym{JPG}.  Opaque formats include proprietary formats that can be
+read and edited only by proprietary word processors, @acronym{SGML} or
+@acronym{XML} for which the @acronym{DTD} and/or processing tools are
+not generally available, and the machine-generated @acronym{HTML},
+PostScript or @acronym{PDF} produced by some word processors for
+output purposes only.
+
+The ``Title Page'' means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page.  For works in
+formats which do not have any title page as such, ``Title Page'' means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+A section ``Entitled XYZ'' means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language.  (Here XYZ stands for a
+specific section name mentioned below, such as ``Acknowledgements'',
+``Dedications'', ``Endorsements'', or ``History''.)  To ``Preserve the Title''
+of such a section when you modify the Document means that it remains a
+section ``Entitled XYZ'' according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document.  These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+@item
+VERBATIM COPYING
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License.  You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute.  However, you may accept
+compensation in exchange for copies.  If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+@item
+COPYING IN QUANTITY
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover.  Both covers must also clearly and legibly identify
+you as the publisher of these copies.  The front cover must present
+the full title with all words of the title equally prominent and
+visible.  You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+@item
+MODIFICATIONS
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it.  In addition, you must do these things in the Modified Version:
+
+@enumerate A
+@item
+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.
+
+@item
+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.
+
+@item
+State on the Title page the name of the publisher of the
+Modified Version, as the publisher.
+
+@item
+Preserve all the copyright notices of the Document.
+
+@item
+Add an appropriate copyright notice for your modifications
+adjacent to the other copyright notices.
+
+@item
+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 Addendum below.
+
+@item
+Preserve in that license notice the full lists of Invariant Sections
+and required Cover Texts given in the Document's license notice.
+
+@item
+Include an unaltered copy of this License.
+
+@item
+Preserve the section Entitled ``History'', 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 ``History'' 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.
+
+@item
+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 ``History'' 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.
+
+@item
+For any section Entitled ``Acknowledgements'' or ``Dedications'', 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.
+
+@item
+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.
+
+@item
+Delete any section Entitled ``Endorsements''.  Such a section
+may not be included in the Modified Version.
+
+@item
+Do not retitle any existing section to be Entitled ``Endorsements'' or
+to conflict in title with any Invariant Section.
+
+@item
+Preserve any Warranty Disclaimers.
+@end enumerate
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant.  To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled ``Endorsements'', provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version.  Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity.  If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+@item
+COMBINING DOCUMENTS
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy.  If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled ``History''
+in the various original documents, forming one section Entitled
+``History''; likewise combine any sections Entitled ``Acknowledgements'',
+and any sections Entitled ``Dedications''.  You must delete all
+sections Entitled ``Endorsements.''
+
+@item
+COLLECTIONS OF DOCUMENTS
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+@item
+AGGREGATION WITH INDEPENDENT WORKS
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an ``aggregate'' if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+@item
+TRANSLATION
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections.  You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
+the original English version of this License and the original versions
+of those notices and disclaimers.  In case of a disagreement between
+the translation and the original version of this License or a notice
+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled ``Acknowledgements'',
+``Dedications'', or ``History'', the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+@item
+TERMINATION
+
+You may not copy, modify, sublicense, or distribute the Document except
+as expressly provided for under this License.  Any other attempt to
+copy, modify, sublicense or distribute the Document 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.
+
+@item
+FUTURE REVISIONS OF THIS LICENSE
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation 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.  See
+@uref{http://www.gnu.org/copyleft/}.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License ``or any later version'' applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation.  If the Document does not specify a version
+number of this License, you may choose any version ever published (not
+as a draft) by the Free Software Foundation.
+@end enumerate
+
+@page
+@appendixsec ADDENDUM: How to use this License for your documents
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+@smallexample
+@group
+  Copyright (C)  @var{year}  @var{your name}.
+  Permission is granted to copy, distribute and/or modify this document
+  under the terms of the GNU Free Documentation License, Version 1.2
+  or any later version published by the Free Software Foundation;
+  with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+  Texts.  A copy of the license is included in the section entitled ``GNU
+  Free Documentation License''.
+@end group
+@end smallexample
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the ``with...Texts.'' line with this:
+
+@smallexample
+@group
+    with the Invariant Sections being @var{list their titles}, with
+    the Front-Cover Texts being @var{list}, and with the Back-Cover Texts
+    being @var{list}.
+@end group
+@end smallexample
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to su