title: Kill all delayed_job workers
body: <p>I use delayed_job as a daemon <a href="https://github.com/tobi/delayed_job/wiki/Running-Delayed::Worker-as-a-daemon" rel="nofollow noreferrer">https://github.com/tobi/delayed_job/wiki/Running-Delayed::Worker-as-a-daemon</a></p>
  
  <p>I can't tell why, but sometimes I see more than one job done by several workers (different pids), and running <code>stop</code> doesn't stop anything. is there a way to kill all daemons of this proc/all workers? Or kill a specific pid (I'm on a shared hosting so kill/killall aren't available for me).</p>