title: Configuration of com.sun.faces.config.ConfigureListener
body: <p>I'm reviewing a current JSF project where the <code>web.xml</code> configuration contains:</p>
  
  <ul>
  <li>the FacesServlet (configured on <code>*.xhtml</code>)</li>
  <li>the <code>com.sun.faces.config.ConfigureListener</code></li>
  </ul>
  
  <p>I'm using JSF 2.2 and Mojarra implementation.</p>
  
  <p>I'm confused about the <code>ConfigureListener</code>. Is this class needed in the configuration? What is the goal of this class? I couldn't find any information and the class has almost no javadoc.</p>
  
  <p>If I remove this configuration, everything seem to work the same way. Thus I guess that the <code>ConfigureListener</code> could or should be removed but I am not sure. </p>