title: An alternative to NanoHTTPD that handles simultaneous connections?
body: <p>I started using NanoHTTPD for a project. Indeed it is very good in its simplicity. Unfortunately it turned out that I need to handle simultaneous connections, for example I have a very long response and in the meanwhile the server shall not be blocked. </p>
  
  <p>What do you recommend? I need it to be simple and feature rich as Nano.</p>