title: Play/BoneCP message "releaseHelperThreads has been deprecated"
body: <p>Does anyone know if the following message obtained when starting a Play 2.2 app is important or not?</p>
  
  <pre><code>WARN  - releaseHelperThreads has been deprecated 
    -- it tends to slow down your application more.
  </code></pre>
  
  <p>I cannot find this setting anywhere, and most references to the message are just log output. I'm assuming it is a bonecp setting, but can't see where play is setting it, if, in fact, it is doing so.</p>