Add a direntry to the Rottlog info manual.

diff --git a/doc/rottlog.texi b/doc/rottlog.texi
index 0ba8019..0f29916 100644
--- a/doc/rottlog.texi
+++ b/doc/rottlog.texi
@@ -18,6 +18,11 @@ Documentation License.''
 @end quotation
 @end copying
 
+@dircategory System administration
+@direntry
+* Rottlog: (rottlog).         The GNU log management utility.
+@end direntry
+
 @paragraphindent none
 
 @iftex
oszko.org/cgit-static/cgit.png' alt='cgit logo'/></a></td>
<td class='main'><a href='/'>index</a> : <a href='/guix/'>guix</a></td><td class='form'><form method='get'>
<input type='hidden' name='id' value='671da915099a552c23b728fc45580530060607ce'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=671da915099a552c23b728fc45580530060607ce'>refs</a><a class='active' href='/guix/log/nix'>log</a><a href='/guix/tree/nix?id=671da915099a552c23b728fc45580530060607ce'>tree</a><a href='/guix/commit/nix?id=671da915099a552c23b728fc45580530060607ce'>commit</a><a href='/guix/diff/nix?id=671da915099a552c23b728fc45580530060607ce'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix'>
<input type='hidden' name='id' value='671da915099a552c23b728fc45580530060607ce'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
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<div class='path'>path: <a href='/guix/log/?id=671da915099a552c23b728fc45580530060607ce'>root</a>/<a href='/guix/log/nix?id=671da915099a552c23b728fc45580530060607ce'>nix</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/nix?id=671da915099a552c23b728fc45580530060607ce&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-06-26 22:59:55 +0200'>2024-06-26</span></td><td><a href='/guix/commit/nix?id=d11b96eb5493231a5a35045505ff8ae8aa746b8e'>etc: Add explicit ‘--substitute-urls’ in guix-daemon service files.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-05-13 16:31:34 +0200'>2024-05-13</span></td><td><a href='/guix/commit/nix?id=7757fdd491862fa5c33f1f894503346b89898a01'>daemon: Loop over ‘copy_file_range’ upon short writes.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-03-12 14:07:28 +0100'>2024-03-12</span></td><td><a href='/guix/commit/nix?id=ff1251de0bc327ec478fc66a562430fbf35aef42'>daemon: Address shortcoming in previous security fix for CVE-2024-27297.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-03-11 22:12:34 +0100'>2024-03-11</span></td><td><a href='/guix/commit/nix?id=8f4ffb3fae133bb21d7991e97c2f19a7108b1143'>daemon: Protect against FD escape when building fixed-output derivations (CVE...</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-01-05 17:27:21 +0100'>2024-01-05</span></td><td><a href='/guix/commit/nix?id=d5724111ea2a8f5312b47fe9aae2bc74278c127e'>daemon: Change default ‘timeout’ and ‘max-silent-time’ values.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-12-17 01:00:00 +0100'>2023-12-17</span></td><td><a href='/guix/commit/nix?id=892ec53b7eedf998afa149b9cdd169f0cab8f41d'>daemon: Fix my own whitespace errors.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2023-12-10 01:00:00 +0100'>2023-12-10</span></td><td><a href='/guix/commit/nix?id=d993ed43b2bae8717437aa27d9d33fd223a6411f'>daemon: Sacrifice builders on OOM.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2023-12-11 23:18:53 +0100'>2023-12-11</span></td><td><a href='/guix/commit/nix?id=1e47148f46e31eb99ce8ec7bc12232cf50d0ebec'>daemon: Implement ‘substitute-urls’ RPC.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-12-04 22:26:36 +0100'>2023-12-04</span></td><td><a href='/guix/commit/nix?id=d83d4488da5c3bb65867bffa2b8587a7c7b056cc'>daemon: Simplify “empty status” substitute error message.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-09-24 02:00:00 +0200'>2023-09-24</span></td><td><a href='/guix/commit/nix?id=0500af5556307d0a4c14a23864e9e4bccd2643d7'>Revert "build: Add missing guix-gc.timer file to binary tarball."</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2023-09-26 17:36:58 +0200'>2023-09-26</span></td><td><a href='/guix/commit/nix?id=95f21231352b66f92c466cb30f2258291e854f2f'>daemon: Add “git-download” built-in builder.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-09-09 18:47:35 +0200'>2023-09-09</span></td><td><a href='/guix/commit/nix?id=cd469932758bf2bec1ff9c82aeb373e18730d0c4'>daemon: Fix build with GCC 13.</a><span class='msg-avail'>...</span></td><td>Sören Tempel</td></tr>
<tr><td><span title='2023-08-31 23:31:49 -0400'>2023-08-31</span></td><td><a href='/guix/commit/nix?id=69f6edc1a8596d2cb4c67e0435d35633af6f3cbc'>build: Add missing guix-gc.timer file to binary tarball.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>