title: I want this action to respond to vcs mime type
body: <p>I have a Rails 3.2 app with the following mime type configured in config/ini/mime_types...</p>
  
  <pre><code>Mime::Type.register "application/hbs-vcs, text/calendar, text/x-vcalendar", :vcs  
  </code></pre>
  
  <p>I have this action in my application_controller...</p>
  
  <pre><code>  def do_410
      render :template =&gt; "/shared/410", :status =&gt; 410
    end
  </code></pre>
  
  <p>I would like this action to respond the vcs extension is it is called. So something like <code>dev/events/2158.vcs</code> would respond to this action without an error. Right now I get the error...</p>
  
  <pre><code>Missing template shared/410 with {:locale=&gt;[:en], :formats=&gt;[:vcs], :handlers=&gt;[:erb, :builder, :coffee]}. Searched in:
  </code></pre>
  
  <p>I tried a respond_to block in this action but I get the multiple redirect error if I do that.</p>