DISPATCH-1269: improvements to remote sasl plugin
DISPATCH-1269: improvements to remote sasl plugin

* explicitly handle partial close of downstream socket
* close downstream connection if upstream is closed

ganeshmurthy/qpid-dispatch,mgoulish/qpid-dispatch,ErnieAllen/qpid-dispatch,bhardesty/qpid-dispatch,bhardesty/qpid-dispatch,mgoulish/qpid-dispatch,ChugR/qpid-dispatch,ErnieAllen/qpid-dispatch,mgoulish/qpid-dispatch,ErnieAllen/qpid-dispatch,ChugR/qpid-dispatch,apache/qpid-dispatch,ganeshmurthy/qpid-dispatch,ChugR/qpid-dispatch,bhardesty/qpid-dispatch,ErnieAllen/qpid-dispatch,bhardesty/qpid-dispatch,apache/qpid-dispatch,mgoulish/qpid-dispatch,kgiusti/dispatch,ganeshmurthy/qpid-dispatch,bhardesty/qpid-dispatch,kgiusti/dispatch,ted-ross/qpid-dispatch,bhardesty/qpid-dispatch,ChugR/qpid-dispatch,ChugR/qpid-dispatch,kgiusti/dispatch,ted-ross/qpid-dispatch,kgiusti/dispatch,apache/dispatch,apache/qpid-dispatch,ganeshmurthy/qpid-dispatch,kgiusti/dispatch,apache/qpid-dispatch,apache/dispatch,ganeshmurthy/qpid-dispatch,ted-ross/qpid-dispatch,apache/dispatch,mgoulish/qpid-dispatch,ErnieAllen/qpid-dispatch,apache/dispatch,ted-ross/qpid-dispatch,ErnieAllen/qpid-dispatch,ted-ross/qpid-dispatch,bhardesty/qpid-dispatch,apache/dispatch,apache/qpid-dispatch,ChugR/qpid-dispatch,apache/dispatch,ted-ross/qpid-dispatch,apache/qpid-dispatch,mgoulish/qpid-dispatch,kgiusti/dispatch,apache/dispatch,ganeshmurthy/qpid-dispatch