K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2017-10-13T09:42:05.536192Z
K 7
svn:log
V 467
remove process and jail directory machinations from dounmount

The manipulations done by mountcheckdirs() are not that useful during
the unmount, they can bring about unexpected security consequences.

Thic change effectively reverts the change in r73241.

The change also allows to simplify the handling of rootvnode global
variable.

Discussed with:	mckusick, mjg, kib
Reviewed by:	trasz
MFC after:	1 month
Differential Revision: https://reviews.freebsd.org/D12366

END