title: Munin: Change plugin category using munin.conf, when plugin filename contains dots?
body: <p>Each plugin in munin has some configuration settings and one of them is the category it belongs to (graph_category).</p>
  
  <p>I would like to change the category of some plugins to the non-default one. As I see in the munin.conf man page, I can change specific directives for plugins per host like this:</p>
  
  <pre><code>[machine1.your.dom]
      address localhost
      load.graph_title Edited title of the load-graph
  </code></pre>
  
  <p>Now I tried the same with the ping plugin and the graph_category instead of the graph_title as shows this example, but I can't get it to work.</p>
  
  <p>I have a machine pinging different hosts with different meaning, so I would like to group them in different categories for easy access.</p>
  
  <p>for example:</p>
  
  <pre><code>ping_192.168.1.1    &lt;- category: lan connectivity
  ping_192.168.1.2    &lt;- category: lan connectivity
  ping_10.0.0.10      &lt;- category: intranet connectivity
  ping_10.0.0.20      &lt;- category: intranet connectivity
  ping_www.google.com &lt;- category: internet connectivity
  </code></pre>
  
  <p>UPDATE:
  I tried the same with another plugin and it worked. I suspect it's something with the periods included in the domain or IP address of the ping plugin name.</p>