I don't think it's a work around but rather a way of handling RFC 3261 via strict
adhesion or lessened for non-compliant UAs, etc as described in
http://kamailio.org/docs/modules/stable/modules/usrloc.html#contact-matchin…
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Reply to this email directly or view it on GitHub:
https://github.com/kamailio/kamailio/issues/280#issuecomment-128695228