Docbook 1.79.2 makes very few changes apart from changing the canonical URL
to cdn.docbook.org.  This patch adds support for the previous URL to avoid
breaking packages that still use that.

Adapted from Debian:
https://salsa.debian.org/debian/docbook-xsl/-/blob/master/debian/patches/0005-catalog.xml-Compatibility-with-1.79.1-or-earlier.patch

--- a/catalog.xml
+++ b/catalog.xml
@@ -5,4 +5,7 @@
   <rewriteSystem systemIdStartString="http://cdn.docbook.org/release/xsl/current/" rewritePrefix="./"/>
   <rewriteURI uriStartString="http://cdn.docbook.org/release/xsl/1.79.2/" rewritePrefix="./"/>
   <rewriteSystem systemIdStartString="http://cdn.docbook.org/release/xsl/1.79.2/" rewritePrefix="./"/>
+  <!-- Also support old URI of v1.79.1 or earlier -->
+  <rewriteURI uriStartString="http://docbook.sourceforge.net/release/xsl/current/" rewritePrefix="./"/>
+  <rewriteSystem systemIdStartString="http://docbook.sourceforge.net/release/xsl/current/" rewritePrefix="./"/>
 </catalog>
s'><tr><td>
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<div class='path'>path: <a href='/guix/log/?id=88563b71c70ff42168771402b2820f01ccd02420'>root</a>/<a href='/guix/log/tests?id=88563b71c70ff42168771402b2820f01ccd02420'>tests</a>/<a href='/guix/log/tests/pack.scm?id=88563b71c70ff42168771402b2820f01ccd02420'>pack.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/pack.scm?id=88563b71c70ff42168771402b2820f01ccd02420&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-07-18 02:02:34 -0400'>2021-07-18</span></td><td><a href='/guix/commit/tests/pack.scm?id=aeded14b8342c1e72afd014a1bc121770f8c3a1c'>pack: Allow embedding custom control files in deb packs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/pack.scm (self-contained-tarball/builder)
[extra-options]: New argument.
(self-contained-tarball, squashfs-image, docker-image)
(debian-archive): Likewise.  Remove two TODO comments.  Document
EXTRA-OPTIONS.  Use the custom control files when provided.
(%deb-format-options): New variable.
(show-deb-format-options, show-deb-format-options/detailed): New procedures.
(%options): Register new options.
(show-help): Augment with new usage.
(guix-pack): Validate and propagate new argument values.
* doc/guix.texi (Invoking guix pack)[deb]: Document how to list advanced
options.  Add an example.
* tests/pack.scm (deb archive...): Provide extra-options to the debian-archive
procedure, and validate that the provided files are embedded in the pack.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-06-29 14:53:21 -0400'>2021-06-29</span></td><td><a href='/guix/commit/tests/pack.scm?id=82daab42811a2e3c7684ebdf12af75ff0fa67b99'>pack: Add support for the deb format.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .dir-locals.el (scheme-mode)[gexp-&gt;derivation]: Define indentation rule.
* guix/scripts/pack.scm (debian-archive): New procedure.
(%formats): Register the new deb format.
(show-formats): Add it to the usage string.
* tests/pack.scm (%ar-bootstrap): New variable.
(deb archive with symlinks): New test.
* doc/guix.texi (Invoking guix pack): Document it.
* NEWS: Add news entry.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-06-29 14:53:21 -0400'>2021-06-29</span></td><td><a href='/guix/commit/tests/pack.scm?id=8108c266dc2fbc70602b2aa5c6887bf17bed16e8'>tests: pack: Fix compressor extension.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/pack.scm (%gzip-compressor): Add the missing leading period to the
gzip compressor file extension.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-07-20 23:25:09 +0200'>2020-07-20</span></td><td><a href='/guix/commit/tests/pack.scm?id=b3802495f607fd5e17c5acf0be2ee014036e2464'>pack: Build the store database under a UTF-8 locale.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/42389&gt;.
Reported by branjam4@gmail.com.

* guix/scripts/pack.scm (store-database)[build]: Add calls to 'setenv'
and 'setlocale'.
* tests/pack.scm ("self-contained-tarball + localstatedir, UTF-8 file
names"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-07-20 23:25:09 +0200'>2020-07-20</span></td><td><a href='/guix/commit/tests/pack.scm?id=181e0dddd68dc58190bd4831ea5d1ecbd420d83a'>pack: 'self-contained-tarball' runs derivation in a UTF-8local.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/pack.scm (self-contained-tarball)
[set-utf8-locale]: New variable.
[build]: Use it.
* tests/pack.scm ("self-contained-tarball"): Use a &lt;profile&gt; record
instead of 'profile-derivation'.
</span></span></td><td>Ludovic Courtès</td></tr>