- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Build usr.bin/ with WARNS=6 by default.

Also add some missing $FreeBSD$ to keep svn happy.

Add a basic manual page for elf2aout.
Alter Makefile and remove NO_MAN.

PR: 109975

Start the dreaded NOFOO -> NO_FOO conversion.

OK'ed by: core

For variables that are only checked with defined(), don't provide
any fake value.

Back out the totally unapproved backout of my commits.

Back out the removal (here too) of the "custom" version of
<sys/endian.h>. It is needed to cross-build sparc64 on
RELENG_4 and to build sparc64 on say 5.0-DP1 (on systems
without <sys/endian.h>). This will be revisited when we
create RELENG_5.

Spotted by: make universe

Use the offical sys/endian.h rather than reaching way over into another
binary's directory to use a private header.

Adjust path to crunchide.

Set NO_WERROR to ignore the following warning which is emitted on
alphas:
.../elf2aout.c:130: warning: cast increases required alignment of
target type
The warning is about casting ((char *)e + phoff) to a struct pointer,
where e is aligned but phoff might be garbage, so I think the warning
should be emitted on most machines (even on i386's, alignment checking
might be on) and the correct fix would involve validation phoff before
using it.

Make it work for a different endianness binary.
(This version is still limited to ELF64.)

Reviewed by: jake

Add a Makefile for this.