socket_loopback_reuseport
return socket_loopback_reuseport(family, sotype, -1);
s = socket_loopback_reuseport(family, sotype, reuseport_prog);
s1 = socket_loopback_reuseport(family, sotype, reuseport_prog);
s2 = socket_loopback_reuseport(family, sotype, reuseport_prog);
s = socket_loopback_reuseport(family, sotype | SOCK_NONBLOCK,