[new-feature]: Dynamic Inbound Registration in PJSIP

[Mahmo0odsalah]

Feature Description

Allow dynamic registration of peers in res_pjsip, similar to the functionality of autocreatepeer in chan_sip. So that any register request is accepted on a specific endpoint. Example usage is as follows:

I have a website that communicates with a Janus Server over WebRTC. The Janus server is responsible for authentication and it communicates over SIP with an Asterisk server over Private IP. My users are dynamically created/removed so I cannot encode their contacts in Asterisk config. I want to allow any inbound registration from the Janus server regardless of user/contact/AOR. Currently this has been working fine using chan_sip but I can’t figure out how to do so in pjsip.