Fixup some incorrect information and some comments. These changes
were cherry picked up the upstream OpenBSD repository. At some point we
will look at doing another import, but the diffs are substantial and will
require some careful testing.

Differential Revision: https://reviews.freebsd.org/D25021
MFC after: 2 weeks
Submitted by: gbe
Reviewed by: myself, bcr

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.