K 10
svn:author
V 4
ngie
K 8
svn:date
V 27
2022-04-11T02:09:07.159112Z
K 7
svn:log
V 745
Add `kern.features.witness`

Adding `kern.features.witness` helps expose whether or not the kernel has
`options WITNESS` enabled, so the `feature_present(3)` API can be used
to query whether or not witness(9) is built into the kernel.

This support is helpful with userspace applications (generally speaking,
tests), as it can be queried to determine whether or not tests related
to WITNESS should be run.

MFC after:	1 week
Reviewed by: cem, darrick.freebsd_gmail.com
Differential Revision: https://reviews.freebsd.org/D25302
Sponsored by:	DellEMC Isilon

Conflicts:
	sys/kern/subr_witness.c

(cherry picked from commit d6701b6c8ccf35c66d357fe02494d0f60ee62f4e)

Git Hash:   52122fa0968fdaaacf3803e711604d4600d489ff
Git Author: ngie@FreeBSD.org
END