ext/sockets: adding SOCK_CLOEXEC/SOCK_NONBLOCK options.

targetted for socket_create_pair/socket_create, they re not considered
as socket type but to be ORed with these (to avoid socketpa

ext/sockets: adding SOCK_CLOEXEC/SOCK_NONBLOCK options.

targetted for socket_create_pair/socket_create, they re not considered
as socket type but to be ORed with these (to avoid socketpair2/socket2
likely), set O_CLOEXEC/O_NONBLOCK respectively on the file descriptors.

close GH-15322

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