Fix handling of sip-options-respond-503-on-busy profile parameter#2980

bundasmanu wants to merge 2 commits intosignalwire:mastersignalwire/freeswitch:masterfrom

bundasmanu:improve_503_handling_for_sip_optionsbundasmanu/freeswitch:improve_503_handling_for_sip_optionsCopy head branch name to clipboard