K 10
svn:author
V 8
dumbbell
K 8
svn:date
V 27
2014-08-27T10:04:10.926132Z
K 7
svn:log
V 343
vt(4): Add cngrab() and cnungrab() callbacks

They are used when a panic occurs or when entering a DDB session for
instance.

cngrab() forces a vt-switch to the console window, no matter if the
original window is another terminal or an X session. However, cnungrab()
doesn't vt-switch back to the original window currently.

MFC after:	1 week

END