Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

META_MODE: Remove DEP_MACHINE from Makefile.depend files.

This has not been needed since r246865 in projects/bmake.

Sponsored by: EMC / Isilon Storage Division

META_MODE: Remove DEP_RELDIR from Makefile.depend files.

This has not been needed since r284171 in projects/bmake.

Sponsored by: EMC / Isilon Storage Division

Add META_MODE support.

Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.

Still need to add real targets under targets/ to build packages.

Differential Revision: D2796
Reviewed by: brooks imp

Convert usr.sbin to LIBADD
Reduce overlinking

Change <sys/diskpc98.h> to not redefine the same symbols that are
being defined in <sys/diskmbr.h>. Instead give the symbols here a
"PC98_" prefix. This way, both <sys/diskmbr.h> and <sys/diskpc98.h>
can be included in the same C source file.

The renaming is trivial. The only gotcha is that DOSBBSECTOR is
also redefined from 0 to 1. This because DOSBBSECTOR was always
used in conjunction with an addition of 1. The PC98_BBSECTOR symbol
is defined as 1 and the expression is simplified.

Note: it is not believed that ports are seriously impacted; or at
all for that matter.

Approved by: nyan@

Correct typo in usage message.

Merged from boot0cfg.
- Update the mkrdev function.
- Attempt gctl verb "write MBR" when updating.

Reduce diffs from boot0cfg.c (no functional change).

Sort sections.

Added the EXIT STATUS section where appropriate.

Mechanically kill hard sentence breaks.

Use ascii null char ('\0') instead of NULL.

Submitted by: Stefan Farfeleder <stefan@fafoe.narf.at>

s/DIOCGPC98/DIOCSPC98/

Use DIOCGPC98 ioctl to write boot block.

The .Nm utility

Fix typo: s/secotor/sector/.

Added the command name to the synopsis section.

Submitted by: NAKAJI Hiroyuki <nakaji@tutrp.tut.ac.jp>
MFC after: 3 days

mdoc(7) police: utilize the new .Ex macro.

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

Remove whitespace at EOL.

Constify and set WARNS=2.

Submitted by: Mike Barcroft <mike@q9media.com>
Reviewed by: md5(1)

- Backout botched attempt to introduce MANSECT feature.
- MAN[1-9] -> MAN.

Set the default manual section for usr.sbin/ to 8.

mdoc(7) police: split punctuation characters + misc fixes.

Prepare for mdoc(7)NG.

remove trailing periods from SEE ALSO.

Added PC-98 boot manager installation and configuration utility.