[sr-dev] about reg-id

[jh at tutpro.com]

if an UA registers an ar two times with same +sip.instance and reg-id,
will registrar replace the earlier one with the new one?  this kind of
thing can happen, for example, when the UA has lost connection with
outbound proxy and re-registers.

based on what i have understood from the ob rfc, registrar should replace
the old location entry with same +sip.instance and reg-id, but i haven't
looked kamailio code. if it does, things get simpler in t_serial, because
i don't need to care about reg-id at all and can just compare
+sip.instance values of contacts.

-- juha