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

Merge the projects/release-pkg branch to head.

This allows packaging the base system with pkg(8), including
but not limited to providing the ability to provide upstream
binary update possibilities for non-tier-1 architectures.

This merge is a requirement of the 11.0-RELEASE, and as such,
thank you to everyone that has tested the project branch.

Documentation in build(7) etc. is still somewhat sparse, but
updates to those parts will follow.

Sponsored by: The FreeBSD Foundation

Convert sbin/ to LIBADD
Reduce overlinking

Add missing library dependencies.

PR: bin/127573
Submitted by: Eygene Ryabinkin

Attempt gctl verb "write MBR" when updating.

This should solve the problem of modifying a busy MBR.

style.Makefile(5):
Use WARNS?= instead of WARNS=.

Pull in the encoding/decoding functions for struct dos_partition.

Add a very simple regression test for "fdisk -I".

Get this to WARNS=4 and closer to style(9) at a sacrifice in
linelength.

Default to WARNS=2.
Binary builds that cannot handle this must explicitly set WARNS=0.

Reviewed by: mike

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

Set the default manual section for sbin/ to 8.

$Id$ -> $FreeBSD$

Drop the embedded boot code in favour of a -B option which reads
the boot code from /boot/mbr, or elsewhere as defined by the revised
"-b bootcode" option; use getopt(3); clarify usage(); partially
revise man page; etc.

Remove trailing whitespace.

New manual page system

Initial import, 0.1 + pk 0.2.4-B1