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
a href='/'><img src='https://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='58974e7b1971c9795ab6365b8e80e5140ceba9e5'/><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=58974e7b1971c9795ab6365b8e80e5140ceba9e5'>refs</a><a class='active' href='/guix/log/gnu/packages/mes.scm'>log</a><a href='/guix/tree/gnu/packages/mes.scm?id=58974e7b1971c9795ab6365b8e80e5140ceba9e5'>tree</a><a href='/guix/commit/gnu/packages/mes.scm?id=58974e7b1971c9795ab6365b8e80e5140ceba9e5'>commit</a><a href='/guix/diff/gnu/packages/mes.scm?id=58974e7b1971c9795ab6365b8e80e5140ceba9e5'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/mes.scm'>
<input type='hidden' name='id' value='58974e7b1971c9795ab6365b8e80e5140ceba9e5'/><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=58974e7b1971c9795ab6365b8e80e5140ceba9e5'>root</a>/<a href='/guix/log/gnu?id=58974e7b1971c9795ab6365b8e80e5140ceba9e5'>gnu</a>/<a href='/guix/log/gnu/packages?id=58974e7b1971c9795ab6365b8e80e5140ceba9e5'>packages</a>/<a href='/guix/log/gnu/packages/mes.scm?id=58974e7b1971c9795ab6365b8e80e5140ceba9e5'>mes.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/gnu/packages/mes.scm?id=58974e7b1971c9795ab6365b8e80e5140ceba9e5&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-06-07 18:29:12 +0200'>2022-06-07</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=2c8c9403ae4f9a38d2754d3363797bf216e363fb'>gnu: nyacc: Update to 1.07.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mes.scm (nyacc): Update to 1.07.0.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Felix Lechner</td></tr>
<tr><td><span title='2022-05-06 14:39:45 +0200'>2022-05-06</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=984add419c8856f1ac76ed571fdef2491aaf7924'>gnu: mescc-tools: Update supported-systems.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mes.scm (mescc-tools)[supported-systems]: Add riscv32-linux,
riscv64-linux, remove powerpc64le-linux.
</span></span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2022-05-02 19:07:06 +0200'>2022-05-02</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=6b588da368c77cde82ea2f22ca315116228777ad'>gnu: mes: Update to 0.24.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mes.scm (mes-next)[source]: Update to 0.24.
[native-inputs]: Add m2-planet.
</span></span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2022-05-02 19:07:04 +0200'>2022-05-02</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=c14f1e319551fcc3112ad1facffd32a360118f96'>gnu: m2-planet: Update to 1.9.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mes.scm (m2-planet): Update to 1.9.0.
</span></span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2022-05-02 19:07:02 +0200'>2022-05-02</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=954ff74bc8e5f8855fac10903d552ec3f86d15f5'>gnu: mescc-tools: Update to 1.4.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mes.scm (mescc-tools): Update to 1.4.0.
</span></span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2022-03-09 23:38:18 +0100'>2022-03-09</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=e2ca8119d5ddf240b492cd4af6acdaf4ed3f6632'>gnu: nyacc@1.00.2: Fix build.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes a regression introduced in
f15ca337bec89f238b9b9ced08c2e02c35629a33, whereby adding a dependency on
GUILE-BYTESTRUCTURES would cause a build failure of the FFI helper of
nyacc@1.00.2.

* gnu/packages/mes.scm (nyacc-1.00.2)[propagated-inputs]: New field.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-26 22:31:02 +0100'>2022-01-26</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=90a41fe388102d448b3f91a070e38a7680d2d568'>gnu: nyacc: Remove unnecessary phase.</a><span class='msg-avail'>...<span class='msg-tooltip'>This partially reverts commit f15ca337bec89f238b9b9ced08c2e02c35629a33.  What
mattered was the addition of guile-bytestructures.

* gnu/packages/mes.scm (nyacc)[arguments]: Remove phase
'install-system-module.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2022-01-26 10:16:06 +0100'>2022-01-26</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=f15ca337bec89f238b9b9ced08c2e02c35629a33'>gnu: nyacc: Install all modules.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mes.scm (nyacc)[arguments]: Add build phase
'install-system-module.
[propagated-inputs]: Add guile-bytestructures.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2022-01-26 08:37:57 +0100'>2022-01-26</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=3563558172e2f2711334bdf5ad5ce35c1452923a'>gnu: nyacc: Fix bug 60474.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mes.scm (nyacc)[arguments]: Add build phase 'fix-60474.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2022-01-26 08:37:57 +0100'>2022-01-26</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=011db003ce43bf5dca41e5512ba07a42c77cb9ae'>gnu: nyacc: Update to 1.06.5.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/mes.scm (nyacc): Update to 1.06.5.
[source]: Simplify snippet.
</span></span></td><td>Ricardo Wurmus</td></tr>