EV_DISABLE
if (state == (EV_ENABLE|EV_DISABLE)) {
mevp->me_state = EV_DISABLE;
case EV_DISABLE:
case EV_DISABLE:
case EV_DISABLE:
return (mevent_add_state(tfd, type, func, param, EV_ADD | EV_DISABLE, 0));
newstate &= ~EV_DISABLE;
newstate |= EV_DISABLE;