Remove $FreeBSD$: one-line sh pattern

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

Convert usr.sbin to LIBADD
Reduce overlinking

Replace all uses of libncurses and libtermcap with their wide character
variants. This allows usable file system images (i.e. those with both a
shell and an editor) to be created with only one copy of the curses library.

Exp-run: antoine
PR: 189842
Discussed with: bapt
Sponsored by: DARPA, AFRL

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.

This now passes a make universe with WARNS=6.

The last big commit: let usr.sbin/ use WARNS=6 by default.

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

style.Makefile(5)

Reorder WARNS line for style.

Pointed out by: bde

WARNS=2 cleanup.

PR: bin/32646
MFC after: 2 weeks

Fix some nits I missed in my style cleanup.

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 GCC'isms in CFLAGS.

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

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

Add support for command line editing and history.

Remove src/contrib/bind/bin/nslookup/commands.c as it is generated by lex
from commands.l.

Submitted by: lpc/cdcontrol patches originally by msmith.
Reviewed by: msmith (in theory)

Add the cdcontrol program by Serge Vakulenko. It's my understanding
that this is a superset of cdplay, and perhaps it's time to send cdplay
into the bit bucket if this works well. According to the docs, it has
a friendlier command structure, command line interface etc.
Submitted by: Serge Vakulenko <vak@cronyx.ru>