fails:TCPSocket#initialize using IPv4 when a server is listening on the given address creates a socket which is set to nonblocking
fails:TCPSocket#initialize using IPv6 when a server is listening on the given address creates a socket which is set to nonblocking
fails(low priority excluded from JRuby 10):TCPSocket#initialize using IPv4 when a server is listening on the given address creates a socket which is set to nonblocking
fails(low priority excluded from JRuby 10):TCPSocket#initialize using IPv6 when a server is listening on the given address creates a socket which is set to nonblocking
fails(timeout):TCPSocket#initialize raises IO::TimeoutError with :open_timeout when no server is listening on the given address
