DISPATCH-1657: DISPATCH-1545: check for un-initialized router connection masks
DISPATCH-1657: DISPATCH-1545: check for un-initialized router connection masks

There can be a delay between when a new remote router is discovered
and the connection over which that router is accessed is identified.
If a message is forwarded before this process completes the connection
lookup fails.  The patch checks if the failure occurs and avoids
forwarding the message.

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