K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2012-09-25T22:10:14.587271Z
K 7
svn:log
V 481
Avoid INVARIANTS panic destroying an in-use tap(4)

The requirement (implied by the KASSERT in tap_destroy) that the tap is
closed isn't valid; destroy_dev will block in devdrn while other threads
are in d_* functions.

Note: if_tun had the same issue, addressed in SVN revisions r186391,
r186483 and r186497.  The use of the condvar there appears to be
redundant with the functionality provided by destroy_dev.

Sponsored by:	ADARA Networks
Reviewed by:	dwhite
MFC after:	2 weeks

END