resip/stack: fix dynamic_cast to TlsBaseTransport (merge r10045 from b-webrtc)

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10048 ddefafc4-47db-0310-ae44-fa13212b10f2
-fix comment typo

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10049 ddefafc4-47db-0310-ae44-fa13212b10f2
-add TlsBaseTransport to VS2008 project file

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10050 ddefafc4-47db-0310-ae44-fa13212b10f2
-widen exception catching net 
 -ensures we also catch ParseExceptions when retrieving transaction id's, 
  a problem reported by Roman Romanchenko

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10051 ddefafc4-47db-0310-ae44-fa13212b10f2