K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2019-04-23T17:28:28.441496Z
K 7
svn:log
V 431
tun(4): Defer clearing TUN_OPEN until much later

tun destruction will not continue until TUN_OPEN is cleared. There are brief
moments in tunclose where the mutex is dropped and we've already cleared
TUN_OPEN, so tun_destroy would be able to proceed while we're in the middle
of cleaning up the tun still. tun_destroy should be blocked until these
parts (address/route purges, mostly) are complete.

PR:		233955
MFC after:	2 weeks

END