Found on some servers park_lot variable was not getting set. Added ?: to (?:park)? and then used $1 worked consistently during testing.
Variable valet_context set to the domain_name and removed referred_by_host reason for this change is that the context shouldn't need to change. Since the referred_by_host variables were not used, the sip_refer_to conditions were no longer needed.
FusionPBX
4b71993189