Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Add a command line argument to turn off blocking waiting for the user
to press Ctrl-C (-b). This allows tests with tight loops of mcgrabs
that can stress the multicast tables.

MFC after: 2 weeks

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.

Moved mcgrab(1) into a separate directory -- our .mk infrastructure
doesn't currently have support for building multiple programs in a
single makefile.

While here, fixed manpages and makefiles (missing dependencies).