msc identification in mslookup config: add 'ipa-name' keyword
currently, we identify all MSCs by IPA unit name. But we are already making provision in the code to be able to easily add future interop (think DIAMETER/MAP), by keeping the MSC identification as a union that may be extended with different kinds of MSC identification.
So we should also add an obvious switch in the mslookup config to be future proof:
mslookup server msc msc-1-2-3 service sip.voice at 188.8.131.52 5678
should probably add 'ipa-name' as keyword after 'msc':
msc ipa-name msc-1-2-3 service sip.voice at 184.108.40.206 5678
so that in the future, we could also have things like
msc global-title XxXxXxXxX service sip.voice at 220.127.116.11 5678