WebRTC: modified some comments and error messages

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10518 ddefafc4-47db-0310-ae44-fa13212b10f2
WebRTC: fixed URI matching logic

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10519 ddefafc4-47db-0310-ae44-fa13212b10f2
WebRTC: fixed cookie handling logic

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10520 ddefafc4-47db-0310-ae44-fa13212b10f2
WebRTC: creat and use WsCookieContext class to store/use elements resulting from cookie parsing

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10521 ddefafc4-47db-0310-ae44-fa13212b10f2
WebRTC: Added license text to new classes

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10522 ddefafc4-47db-0310-ae44-fa13212b10f2
WebRTC: clean left-over code and make small code style changes

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10523 ddefafc4-47db-0310-ae44-fa13212b10f2
WebRTC: fix cookie expiration check

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10524 ddefafc4-47db-0310-ae44-fa13212b10f2
WebRTC: only perform cookie authentication for SIP messages coming from WS or WSS transports

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10525 ddefafc4-47db-0310-ae44-fa13212b10f2
WebRTC: cookies must be present for authentication

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-gsoc-2013@10526 ddefafc4-47db-0310-ae44-fa13212b10f2