QPID-5363: Add locks to prevent race condition in Amqp 1.0 transport handler.
Windows clients occasionally crash on exit handling simultaneous 
eof() and close() on separate threads.



git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1543935 13f79535-47bb-0310-9956-ffa450edef68