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diff --git a/doc/ulogd.sgml b/doc/ulogd.sgml
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--- a/doc/ulogd.sgml
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@@ -204,6 +204,17 @@ Using this commandline option, an alternate config file can be used. This is
important if multiple instances of ulogd are to be run on a single machine.
</descrip>
+<sect>Signals / Logrotate
+<p>
+ulogd understands two kinds of signals:
+<descrip>
+<tag>SIGHUP</tag>
+Close and re-open all logfiles. This is mainly intended for logrotate scripts.
+Also closes and re-opens database connections.
+<tag>SIGUSR1</tag>
+Reload configuration file. This is not fully implemented yet.
+</descrip>
+
<sect>Available plugins
<p>
It is important to understand that ulogd without plugins does nothing. It will receive packets, and do nothing with them.