Cleanup webrtc sip conf
user sip config: remove params lately overridden by WebRtc params
tested on my Xivo using /usr/bin/xivo-confgen asterisk/sip.conf
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
user sip config: remove params lately overridden by WebRtc params
tested on my Xivo using /usr/bin/xivo-confgen asterisk/sip.conf