Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\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.

Sync program's usage() with manpage's SYNOPSIS.

Add support for multibyte character conversions.

Submitted by: imura@ryu16.org

mount_udf(8) is currently not in 4.X, so obviously it did not first appear
in 4.6

PR: 46117
Submitted by: Ryuichiro Imura <imura@ryu16.org>
Approved by: re (bmah)

s/filesystem/file system/g as discussed on -developers

mdoc(7) police: nits.

Actually add the UDF files!