rsyslog: Log things classified by "messages" only once.

Signed-off-by: Maximilian Wilhelm <max@rfc2324.org>

rsyslog/ffho/50-messages.conf

@@ -10,3 +10,5 @@ $FileGroup adm
         local2.none,local3.none;\          
         local4.none,local5.none;\          
         local6.none,local7.none          -/var/log/messages
+
+& stop