resip/stack: TlsConnection: check for errors after calling SSL_get_shutdown

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11199 ddefafc4-47db-0310-ae44-fa13212b10f2
rpm: add definitions for stdint to CXXFLAGS

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11200 ddefafc4-47db-0310-ae44-fa13212b10f2
resip/stack: TlsConnection: check for errors after calling SSL_pending

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11201 ddefafc4-47db-0310-ae44-fa13212b10f2
resip/stack: TlsConnection: check for errors after calling SSL_shutdown

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11202 ddefafc4-47db-0310-ae44-fa13212b10f2