[sr-dev] Status of outbound support

[Juha Heinanen]

my bogus register request was without +sip.instance, but with
reg-id.  in such a case, reg-id should be ignored:

   A Contact header field value with an instance-id media feature tag
   but no "reg-id" header field parameter is valid (this combination
   will result in the creation of a GRUU, as described in the GRUU
   specification [RFC5627]), but one with a reg-id but no instance-id is
   not valid.  If the registrar processes a Contact header field value
   with a reg-id but no instance-id, it simply ignores the reg-id
   parameter.

that didn't happen. the result was that location record had NULL in
instance field and 1 in reg-id field.

it would simplify contact handling if in the above case both fields
would be null.

what is the rational that if there is no reg-id field, then location
table has reg-id value 0 instead of null?

-- juha