title: Redirect docker log messages into different syslog file (froward by logspout)
body: <p>I have set up a host with some docker container, where logspout is used to forward all the logging to syslog:</p>
  
  <pre><code>docker run --name="logspout" -d \
    --restart=unless-stopped \
    --volume=/var/run/docker.sock:/var/run/docker.sock \
    --log-opt tag="logspout" \
    gliderlabs/logspout \
    syslog://host-01.example.com:514
  </code></pre>
  
  <p>All the logs are in /var/log/syslog</p>
  
  <p>I would like to split them up into files per container now, as it's getting to cluttered.</p>
  
  <p>When I configure rsyslog to use a different file like this:</p>
  
  <pre><code>munin-server.*                  /var/log/munin.log
  </code></pre>
  
  <p>I get following messages in syslog:</p>
  
  <pre><code>May  9 12:44:39 docker-host-01 rsyslogd: [origin software="rsyslogd" swVersion="8.16.0" x-pid="13893" x-info="http://www.rsyslog.com"] start
  May  9 12:44:39 docker-host-01 rsyslogd-2222: command 'KLogPermitNonKernelFacility' is currently not permitted - did you already set it via a RainerScript command (v6+ config)? [v8.16.0 try http://www.rsyslog.com/e/2222 ]
  May  9 12:44:39 docker-host-01 rsyslogd-2184: action 'munin-server' treated as ':omusrmsg:munin-server' - please use ':omusrmsg:munin-server' syntax instead, 'munin-server' will not be supported in the future [v8.16.0 try http://www.rsyslog.com/e/2184 ]
  May  9 12:44:39 docker-host-01 rsyslogd-3000: user name 'munin-se...' too long - ignored [v8.16.0]
  May  9 12:44:39 docker-host-01 rsyslogd-2207: error during parsing file /etc/rsyslog.d/40-default.conf, on or before line 5: warnings occured in file '/etc/rsyslog.d/40-default.conf' around line 5 [v8.16.0 try http://www.rsyslog.com/e/2207 ]
  </code></pre>
  
  <p>Is there a way to change the name (e.g. <strong>munin-server</strong>) somehow? Or is the message misleading?</p>