yp_bind
if (yp_bind(_yp_domain) == 0)
__weak_alias(yp_bind, _yp_bind);
int yp_bind (const char *);
good = yp_bind(_yp_domain) == 0;
__weak_alias(yp_bind, _yp_bind)
if ((err = yp_bind(domain)) != 0) {
rv = yp_bind(ypi.ourdomain);