resip/stack: SipMessage: return references

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10541 ddefafc4-47db-0310-ae44-fa13212b10f2
repro: BasicWsConnectionValidator: case-insensitive comparison of hex values

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10542 ddefafc4-47db-0310-ae44-fa13212b10f2
resip/stack: add FIXME about rejecting cookies

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10543 ddefafc4-47db-0310-ae44-fa13212b10f2
resip/dum: WsCookieAuthManager: more verbose errors when cookie auth fails

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10544 ddefafc4-47db-0310-ae44-fa13212b10f2