title: why did gitlab 6 switch back to unicorn?
body: <p><a href="http://blog.gitlab.org/gitlab-6-dot-0-released/">Gitlab 6.0</a> was released yesterday. I am curious to know why they switched to <a href="http://unicorn.bogomips.org/">Unicorn</a> from <a href="http://puma.io/">Puma</a>.
  Versions prior to 5 were using <a href="http://unicorn.bogomips.org/">Unicorn</a>. I thought switch to <a href="http://puma.io/">Puma</a> was for the better. </p>
  
  <p>Is there a technical reason for this switch?</p>