Add libxo support to du

Convert du to use libxo enabling structured output.

[[ minor style fixes by imp ]]

Signed-off-by: Nathan Huff <nhuff@acm.org>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1145

usr.bin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

pkgbase: Put a lot of binaries and lib in FreeBSD-runtime

All of them are needed to be able to boot to single user and be able
to repair a existing FreeBSD installation so put them directly into
FreeBSD-runtime.

Reviewed by: bapt, gjb
Differential Revision: https://reviews.freebsd.org/D21503

Add HAS_TESTS to all Makefiles that use the SUBDIR.${MK_TESTS}+= tests idiom

Add some initial basic tests for du(1)

Tests that exercise the following flags are added in this commit:
- -A
- -H
- -I
- -g
- -h
- -k
- -m

Additional tests will be added soon.

MFC after: 1 month

Convert to usr.bin/ to LIBADD
Reduce overlinking

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

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

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

- Import the HEAD csup code which is the basis for the cvsmode work.

Use humanize_number(3) to format sizes into a human readable form.

Mark du(1) as WARNS6 clean.

Tested on: alpha, amd64, i386, ia64, sparc64

Remove leaf node WARNS?=2 (that mainly I added). This should
help the GCC3 transition and CURRENT in general.

WARNS=2 fixup

Fixed LDADD. Using ${LIBM} instead of -lm gave the wrong libm in most
cases and broke the world in some cases.

Fixed style bugs for DPADD and LDADD (don't use += for variables defined
only once).

cleanup using suggestions from bde

Add human-readable output flag, -h

Reviewed by: obrien

Tweaks to allow compiling -Wall (mostly adding "const" to char rcsid[]).

BSD 4.4 Lite Usr.bin Sources