title: Is there a log4net pattern for machineName
body: <p>I'm having a hard time finding documentation on the various 'in the box' patterns like</p>
  
  <pre><code>%logger  
  %level  
  %timestamp  
  </code></pre>
  
  <p>There is of course <a href="http://logging.apache.org/log4net/release/config-examples.html" rel="noreferrer">the example page</a> but I'm not sure that's the full list of options.</p>
  
  <p>I also know that it's possible to MDC parameters out of the app to the logger, but that involves a code change which is a different beast than a config change.</p>
  
  <p>Is there a <code>%machineName</code> option, or <code>machineIP</code> option?  The issue is that we have all our servers in the web farm log into the same database log, and we're now thinking that a disproportionate number of messages are coming from one machine.</p>