zmq: add support for TIPC transport

A ZeroMQ application can opt for TIPC based sockets
using the TIPC port name format:
zmq_bind(sb, "tipc://{type,lower,upper}");
zmq_connect(sc, "tipc://{type,inst}");

'type' is the service ID, and 'lower/upper' can be
used for service partitioning or basic load
balancing.

ZeroMQ TIPC transport requires a kernel >= 3.8
(nonblocking connect support for TIPC).

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
zmq: add TIPC transport tests

The tests are identical to the TCP ones, only the
addressing is changed.

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Merge pull request #110 from Hugne/tipc_support

Tipc support
Fix race condition on shutdown
Backported LIBZMQ-39 fix
Revert "zmq: add TIPC transport tests"

This reverts commit d0aa05fac49ef3640a99c67d323bb3d062f6c355.
Revert "zmq: add support for TIPC transport"

This reverts commit dbc42ee9af098183714845a75139997dcc34c7a0.