events when (de)associating or when cable is (un)plugged

[M. Warner Losh]

In message: <20040327175645.GC90316 at empiric.dek.spc.org>
            Bruce M Simpson <bms at spc.org> writes:
: On Sat, Mar 27, 2004 at 03:37:44AM +0100, Dirk-Willem van Gulik wrote:
: > Suleiman,
: > 
: > Thanks for all the help  - I just hacked up the patch below and took
: > http://green.homeunix.org/~green/linkwatcher.c for  testing. I also
: > had to add the LINKUP/DOWN in some non-mii using ethernet
: > cards (as only miibus(4) seems to issue this event).
: 
: Nice! I'll take a more indepth look at this when less pressed. Keep on hacking.
: Would be nice to hook up with the WirelessLeiden folks too...

Just so people know, I'm planning on adding a few new event stream
types to devd.  These will include link level notifications...

Warner