Remove $FreeBSD$: one-line sh pattern

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

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.

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

Fix the type of .include.

$Id$ -> $FreeBSD$

Move bsd.port.*mk to under ${PORTSDIR}/Mk (already repository copied).
There are only skeletons left here; they merely serve as a backup to
include the real versions under ${PORTSDIR}/Mk while we update the ports
tree to include them directly.

Make bsd.port.mk includable in two phases. bsd.port.pre.mk defines only
a few variables that could be used in the port Makefile for ".if exists()"
tests. bsd.port.post.mk defines the rest.

Note: if you define USE_X_PREFIX or USE_IMAKE, put it before including
bsd.port.pre.mk. These are the only two variables used in the first part.

In reality, bsd.port.pre.mk and bsd.port.post.mk just include bsd.port.mk
with special variables to turn part of it off.