title: Email Group Configuration in CC.NET using a single config file
body: <p>We have started using CC.NET for continuous integration and as the number of projects monitored builds up I would like configure the email alerts via a single config file.</p>
  
  <p>What I mean by this is that I would like to have a list of the users in different groups in a single config file that is referenced by ALL the project configuration files:</p>
  
  <pre><code>&lt;user name="user1" group="buildmasters" address="user1@company.com"/&gt;
  &lt;user name="user2" group="internalapplications" address="user2@company.com"/&gt;
  &lt;user name="user3" group="internalapplications" address="user3@company.com"/&gt;
  &lt;user name="user4" group="externalapplications" address="user4@company.com"/&gt;
  &lt;user name="user5" group="externalapplications" address="user5@company.com"/&gt;
  </code></pre>
  
  <p>Then the project configuration file will reference the correct group:</p>
  
  <pre><code>&lt;group name="internalapplications" notification="change"/&gt;
  </code></pre>
  
  <p>So for the different projects that are internal applications I would import the single config file then set the internal applications group. I would also like to add buildmasters for everything so that for now I can keep track of people if they are having problems.</p>
  
  <p>This would mean I'd like to have a user in two or more groups for example but I don't know if it's possible:</p>
  
  <pre><code>&lt;user name="user1" group="buildmaster, externalapplications" address="user1@company.com"/&gt;
  </code></pre>
  
  <p>I've been working under the assumption that one day I could configure this and have just a single file with all the users email addresses in, but today I've gone to do it and I'm not sure it works like this.</p>
  
  <p>Can anyone describe how they have approached this?</p>