2010/7/28 Iñaki Baz Castillo ibc@aliax.net:
A "Contact" header with no value is *not* valid according to SIP BNF grammar (I'vechecked it), so in case a UA fetches its bindging and there are not bindings then the registrar should reply a 200 without "Contact" header. Taking this into account I suspect that this commit is wrong ("properly return an empty contact").
Well, fortuantelly there is no commit about it, but just a report (please use http://sip-router.org/tracker instead). However as explained above this report is invalid.