Adding SYMSOFT custom AVP for E164 numbers. Also writing all mandatory AVPs in Voice-Service-Information
Setting SYMSOFT vendor ID to their custom AVPs
Adding Location-Info and Call-Disconnect-Reason AVPs. Also changing Subscription-Type in update and terminate CCRs
Adding Multiple-Services-Indicator AVP, as well as mod param to allow specifying a default Validity-Time
Basic implementation to guess end reason when sending CCR stop
Removing hardcoded values and getting them from IMS information
Adding msc_address and vlr_location mod params for SYMSOFT mode
Merge pull request #1 from carlosp/ims-enhancenments

Ims enhancenments