RTS_CHANGED
supplyall(&allrouters, RTS_CHANGED, ifp, _B_TRUE);
supplyall(&allrouters, RTS_CHANGED,
rt->rt_state = RTS_CHANGED;
rt->rt_state |= RTS_CHANGED;
rt->rt_state |= RTS_CHANGED;
{ RTS_CHANGED, "CHANGED" },
rt->rt_state &= ~RTS_CHANGED;
{ RTS_CHANGED, "CHANGED" },