title: Filter chain halted as force SSL rendered or redirected
body: <p>So my app in production has totally crashed with this message:</p>
  
  <pre><code>Filter chain halted as #&lt;Proc:0x007f766547ea18@/app/vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_controller/metal/force_ssl.rb:65&gt; rendered or redirected 
  </code></pre>
  
  <p>I've done some research online and so far this seems to happen mostly in local dev mode when the port is lost. But I'm not sure why this would be happening in my Heroku app... for context the code has not changed, and it was working fine as of 30 minutes ago. I'm using CloudFlare, but I checked that the bare <code>your-app-name.herokuapp.com</code> is also broken with the same error.</p>
  
  <p>Any help appreciated!</p>