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.

Bring files back from the dead prior to remote commit to fix import
conflicts.

Makefile.inc was conditionally setting vars already set by bsd.own.mk
which is read before tip's own Makefile is. Move those varables here
where they will do some good.

Greatly clean up the Makefiles and add a Makefile.inc to more obviously
advertise tip's choice of location and perms.