-VS2010 / WIN32 build fixes

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10816 ddefafc4-47db-0310-ae44-fa13212b10f2
-fix some potential mem leaks found by coverity in DtlsTransport::_read

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10817 ddefafc4-47db-0310-ae44-fa13212b10f2
-VS2008 and VS2005 updates for recent additions

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10818 ddefafc4-47db-0310-ae44-fa13212b10f2