Shorten ZMQ_ROUTER_REASSIGN_IDENTITIES to ZMQ_ROUTER_HANDOVER. Also, added a test for the HANDOVER functionality.
Merge pull request #731 from mbarbisan/master

Shorten ZMQ_ROUTER_REASSIGN_IDENTITIES to ZMQ_ROUTER_HANDOVER. Also, add...
zmq: narrow condition to include TIPC in build/test

As TIPC transport for 0MQ will only work on post 3.8
Linux kernels where nonblocking connect was added,
we add AC_RUN test to check for this functionality.
Should the test fail, tipc is excluded from build/test.

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Merge pull request #732 from Hugne/tipc

zmq: narrow condition to include TIPC in build/test