Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

Correct example.

Submitted by: Jason McIntyre <jmc@kerhand.co.uk>
Thomas Klausner <wiz@netbsd.org>

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.

A bit of rewording for clarity, taken from OpenBSD.

Submitted by: jmc@OpenBSD.org

Update the description of -k, output files appear to
be left regardless of an error, signal, or complete
run.

PR: 69861
Submitted by: vlad902@gmail.com

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

Document input line length limit.

Sort sections.

Added the EXIT STATUS section where appropriate.

Remove BUGS section that talked about missing multibyte character support.
We have support now that the regular expression routines do.

Document missing multibyte character support in utilities specified
by POSIX.

mdoc(7) police: simplify.

Note that this appeared at least as early as PWB UNIX.

Use the literal string 'PWB UNIX', as we still have no .At macro for it.

Respect LC_CTYPE and LC_COLLATE environment variables, mainly for their
effects on regular expressions. The libc regex code does not handle
equivalence classes well (for example), but we do our best.

mdoc(7) police: markup polishing.

Correct synopsis and usage(): pattern arguments are not optional.

Add the csplit(1) utility, which splits files based on context, as specified
by SUSv3.

PR: 36191
Reviewed by: mike