Rather than having code to re-define bcd2bin() for the LinuxKPI
make sure libkern.h is always included before the LinuxKPI version.
Then only re-define our local LinuxKPI implementation.  [1]

From the argument truncating wrapper call the libkern version.
If we change our libkern implementation in the future we can save
us the remainder of the hassle. [2]  Given I need this to MFC,
which I am not sure we can with libkern, commit this intermediate
step.

Suggested by:	Johannes Berg (johannes sipsolutions.net) [1]
Suggested by:	ian [2]
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
X-MFC with:	548ada00e54a9e7745d041b1ec7f68f3bd493365
Differential Revision: https://reviews.freebsd.org/D32695

yocalebo_gmail.com submitted a patch for mountd.c that
fixes the case where a username starts with a digit.
Without this patch, the username that starts with a
digit is misinterpreted as a numeric uid.
With this patch, any string that does not entirely
convert to a decimal number via strtoul() is considered
a user/group name.

Submitted by:	yocalebo_gmail.com
Reviewed by:	rmacklem
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D32993

It's no longer required to have those SCM IDs at the start of makefiles.

MFC after:	3 days

PR:			259112
Reported by:		Robert Morris <rtm@lcs.mit.edu>
Reviewed by:		fsu
MFC after:		3 days
Differential Revision:	https://reviews.freebsd.org/D33030

Entries for a few recently defined rc variables
were missing from rc.conf.5.  This patch adds
those.

It was not obvious to me what the ordering is,
so I added them to the area where other nfsd
related variables are.  I can easily move them.

I also replaced "are" with "is", since it seems to
read better.

This is a content change.

Reviewed by:	debdrup
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D33043

Allocating a BAR will call baraddr which maps the framebuffer. No need
to allocate it explicitly on init.

Reviewed by:     grehan
Sponsored by:    Beckhoff Autmation GmbH & Co. KG
Differential Revision:    https://reviews.freebsd.org/D32596

Tell the guest whether a BAR uses prefetched memory or not for
passthru devices by using the same lobits as the physical device.

Reviewed by:	 grehan
Sponsored by:	 Beckhoff Autmation GmbH & Co. KG
Differential Revision:	  https://reviews.freebsd.org/D32685

Add a define needed by latest iwlwifi-next.

Sponsored by:	The FreeBSD Foundation

As of 28a41182c08e the base system uses Clang/LLVM 13.  Follow along in
Cirrus-CI (which uses a packaged toolchain for speed).

Sponsored by:	The FreeBSD Foundation

MFC after:	3 days

Describe -m argument as "mode" instead of "display".

MFC after:	3 days

While here, fix the indentation of the second line in the message.

MFC after:	3 days

While here, add a short sentence introducing the options.

MFC after:	3 days