[sr-dev] PATCH: fix ser_stun.[hc]

Hi, I have tested the STUN code in sip-router (enabled by make STUN=1) and it became quite clear that this code is based on old I-D's and probably not tested/used against SIP outbound clients implemented according to RFC 5626 this patch fixes some issues, removing the Fingerprint check which is not needed, and fixing the XOR scrambling of XOR-MAPPED-ADDRESS. please review it carefully and apply to your GIT tree if you are happy with it. Signed-Off-By: Alfred E. Heggestad <aeh(a)db.org> --