title: How to add a new signal handler to gunicorn?
body: <p>I need a way to set number of workers for a gunicorn master process.</p>
  
  <p>So I'm thinking of overriding the arbiter and adding a new signal handler, which read the new number of workers from a file.</p>
  
  <p>Which signal would be a proper one to use for this purpose?</p>