title: uWSGI: --master with --emperor spawns two emperors
body: <p>I can see that if I start uwsgi like this:</p>
  
  <pre><code>sudo /usr/local/bin/uwsgi --emperor /etc/uwsgi/vassals --uid www --gid www
  </code></pre>
  
  <p>it creates one emperor copy. But if I start it with <code>--master</code> additionally (as recommended <a href="https://gist.github.com/evildmp/3094281">here</a>), it creates two emperor copies. Does it make sense to use <code>--master</code> with <code>--emperor</code>? I would say no, but if I run it without that option I get this warning:</p>
  
  <p><code>*** WARNING: you are running uWSGI without its master process manager ***</code></p>