Add emergency number config
Add the emergency number list to prefixinfo, using ,
as the separator.
config prefixinfo 'prefixinfo15'
option prefixenable '1'
option prefixrange '112,911'
option facilityaction 'EMERGENCY'
number list goes to pjsip.conf, then used by Asterisk to handle the emergency number.
Should be Merged together with the following MRs:
voice/asterisk!90 (merged)
voice/asterisk-chan-voicemngr!8 (merged)