die with 'OS unsupported' on bad zmq versions

This should make smokers produce NAs per:
https://metacpan.org/source/DAGOLDEN/CPAN-Reporter-1.2011/lib/CPAN/Reporter.pm#L297

	modified:   t/00_available.t
test Socket ->get_socket_opt / ->set_socket_opt

	modified:   t/poex/zmq/socket.t