title: ChannelFactory per socket?
body: <p>When listening from multiple sockets for incoming UDP datagrams, how many <code>ChannelFactory</code>, <code>ConnectionlessBootstrap</code> should be used? Only one? One per socket?</p>
  
  <p>I precise that the decoding handler of the pipeline is different per socket. From one port I expect to receive SIP messages while I expect to receive DNS messages from another port.</p>
  
  <p>Thanks</p>