MFC r314655:

bin: normalize paths using SRCTOP-relative paths or :H when possible

This simplifies make logic/output

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

Convert sbin/ to LIBADD
Reduce overlinking

MFtbemd:

Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.

Bump WARNS where possible.

Checked by: make universe
Approved by: ed (co-mentor)

Spell "disklabel" correctly.

Approved by: ru

Install a 'disklable' alias.

Technical Reviewed by: ru

Sync with bsdlabel/Makefile.

Add a very basic manpage.

Moved libgeom.so dependencies to where they belong.

Reviewed by: phk
Approved by: re (scottl)

Fix the misspelling of DPADD, then fix "make checkdpadd".

Fix for dynamic linking.

Submitted by: Alex Deiter <tiamat@komi.mts.ru>

If we cannot open the parent device for writing, use GEOM::CONFIG_GEOM
requests to write label and bootcode.

The -r argument is ignored (with a warning).

With a lot of help from: jake

Do not link sunlabel to disklabel.

Use explicit encoding/decoding funtions for sunlabel data structures.
Use #defines for various magic numbers.

Attach test-case to makefile.

Reviewed by: jake

Hardlink sunlabel to disklabel so make release is happy. (This only affects
sparc64, where bsd^H^H^Hdisklabel isn't built.)

Add sunlabel, a more or less drop in replacement for bsd^H^H^Hdisklabel(8)
which works on sun labels. Due to the lack of an interface other than
write(2) to update labels, it cannot modify an open partition.