ifwatchd -n vs rum?

[der Mouse <mouse%Rodents-Montreal.ORG@localhost>]

I have a 4.0.1 machine with a wifi USB stick that's handled by the rum
driver.

I find that ifwatchd does not fire its -n event when rum0 transitions
to "no network".  (Yes, ifwatchd is watching rum0; it notices -A and -D
events for rum0 just fine.)

Is this how it's supposed to work?  A little digging to find out why
leads me to think that it's because ieee80211_netbsd.c calls
if_link_state_change only on node join and part, as far as I can see;
it looks as though transitioning to "no network" - clearing IFM_ACTIVE,
I think this means - is not reported to anyone.  Indeed, I'm having
trouble finding where IFM_ACTIVE is _ever_ cleared; I must be missing
something.

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