- Since SIP is a generic protocol implemented by various servers, the
firewall service must describe the protocol instead of the
application. This is similar to the way firewalld handles
http/https. This also make the service descriptions more acceptable
by upstream.
- Split unencrypted and encrypted services so that one can enabled
without the other (a possibility with SIP).
- Add 5061/UDP for SIP over DTLS and DCCP.
