Catch zmq socket_t::bind() failures on startup
Without this zmq socket_t::bind() failure is printed on stdout (and
difficult to track when started in background and with initscript)
Merge remote-tracking branch 'remotes/upstream/dev' into kraken_startup_exception
Merge remote-tracking branch 'remotes/upstream/dev' into kraken_startup_exception
Take advices: only catch bind() calls and return 1
Merge pull request #402 from guikcd/kraken_startup_exception

Catch zmq socket_t::bind() failures on startup