o Split options for the Udp_server and XMPP_server into its own   class so that it's easier to manage and extend;
o Split options for the Udp_server and XMPP_server into its own
  class so that it's easier to manage and extend;

o sync self-tests with what we have in the internal version of the
  stack.

sippy/rtp_cluster,sippy/rtp_cluster