socket_create
extern struct sonode *socket_create(int, int, int, char *, char *, int, int,
so = socket_create(family, type, protocol, buf, NULL,
so = socket_create(family, type, protocol, NULL, NULL,
so = socket_create(domain, type, protocol, NULL, NULL, version, flags,
so = socket_create(domain, type, protocol, NULL,