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
ps://git.koszko.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='0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9'/><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=0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9'>refs</a><a class='active' href='/guix/log/.mailmap'>log</a><a href='/guix/tree/.mailmap?id=0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9'>tree</a><a href='/guix/commit/.mailmap?id=0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9'>commit</a><a href='/guix/diff/.mailmap?id=0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/.mailmap'>
<input type='hidden' name='id' value='0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9'/><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>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9'>root</a>/<a href='/guix/log/.mailmap?id=0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9'>.mailmap</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/.mailmap?id=0e0b349f6bc7f02d0ab8535ea86c48b7dc0eb8d9&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-08-05 00:44:43 +0300'>2024-08-05</span></td><td><a href='/guix/commit/.mailmap?id=3c309a7b7020a9645bfe775d9f53f43f05d076bf'>Change email of Evgeny Pisemsky.</a><span class='msg-avail'>...</span></td><td>Evgeny Pisemsky</td></tr>
<tr><td><span title='2024-01-07 19:07:18 +0100'>2024-01-07</span></td><td><a href='/guix/commit/.mailmap?id=7b58443bc5506a56ea78aaf44006ce6209ee6cc8'>Update mailmap.</a><span class='msg-avail'>...</span></td><td>Tomas Volf</td></tr>
<tr><td><span title='2023-08-16 22:22:06 +0200'>2023-08-16</span></td><td><a href='/guix/commit/.mailmap?id=fce924708c31c09a1b438ae7e8b83d39c492be9a'>Update email addresses for Juliana Sims.</a><span class='msg-avail'>...</span></td><td>Juliana Sims</td></tr>