Remove $FreeBSD$: one-line sh pattern

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

pkgbase: Create a FreeBSD-tcpd package

And put the tcp-wrapper utilities in it.

Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D33439

Use SRCTOP-relative paths to other directories instead of .CURDIR-relative ones

This simplifies pathing in make/displayed output.

MFC after: 1 week
Sponsored by: Dell EMC Isilon

Use LIBEXECDIR for /usr/libexec.

MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division

Convert usr.sbin to LIBADD
Reduce overlinking

Use src.opts.mk in preference to bsd.own.mk except where we need stuff
from the latter.

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.

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.

Reimplementation of world/kernel build options. For details, see:

http://lists.freebsd.org/pipermail/freebsd-current/2006-March/061725.html

The src.conf(5) manpage is to follow in a few days.

Brought to you by: imp, jhb, kris, phk, ru (all bugs are mine)

NOINET6 -> NO_INET6

Drop MAINTAINER bits from here.

Don't clobber the default for CFLAGS.

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.

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

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

Add IPv6 scoped address support.
It enables us to control link-local connections by interface like
this:

ALL : [fe80::%ed0]/10 : allow
ALL : [fe80::]/10 : deny

$Id$ -> $FreeBSD$

Build tcp_wrappers' userland. I am not building tcpd, because in a day
or two, inetd will gain the necessary functionality. At that stage,
I'll make wrapping the default for sendmail and portmapper as well.