title: How to join two Salt pillar files and merge data?
body: <p>Is there any way to join two pillar files? </p>
  
  <p>I have a users pillar. It's something like:</p>
  
  <pre><code>users:
    joe:
      sudouser: True
    jack:
      sudouser: False
  </code></pre>
  
  <p>Now I need different set of users for certain servers (ie. add some users to one server). So I create new pillar file:</p>
  
  <pre><code>users:
    new_user:
      sudouser: True
  </code></pre>
  
  <p>And assign this topfile to the server. But because the key is the same it would overwrite the first one. If I change it I would need to update the state file (which I really don't want). How should I approach this problem? Is there any way to tell salt to "merge" the files? </p>