[sr-dev] [kamailio/kamailio] set_contact_alias() issue with clients adding it to their Contact (#2308)

[mtryfoss]

handle_ruri_alias() only handle alias in Request-URI, not the Contact returned by the registrar for REGISTER.

For most phone clients this is not a problem but Bria used that info in subsequent requests.
So, when the proxy again doing set_contact_alias() on an INVITE from Bria (already containing an alias), you'll end up with two alias parameters. One of them might be outdated if port/source-ip has changed through NAT since initial registration.

When proxy then calls handle_ruri_alias() the first parameter is handled and removed, and you'll send the one which the proxy actually added back to the client. The ip/port used in the reply might be wrong if the alias Bria added is outdated.

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