Remove $FreeBSD$: two-line nroff pattern

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

Add some HISTORY sections to manpages

environ(7) was in AT&T Version 7
ac(8): Add a HISTORY section
sa(8): Add a HISTORY section
sqrt(3): Add the actual sqrt function to the HISTORY section

Obtained from: OpenBSD

Submitted by: gbergling@gmail.com
Approved by: bcr@(mentor)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D23693

use .Mt to mark up email addresses consistently (part2)

PR: 191174
Submitted by: Franco Fichtner <franco@lastsummer.de>

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

mdoc: move remaining sections into consistent order

This pertains mostly to FILES, HISTORY, EXIT STATUS and AUTHORS sections.

Found by: mdocml lint run
Reviewed by: ru

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.

Add -U and -P options that allow the specification of the per-user
and per-process summary file location.
These make the program more flexible, and also make it possible to write
sane regression tests.

Expand contractions.

Sort sections.

Added the EXIT STATUS section where appropriate.

Mechanically kill hard sentence breaks.

The .Nm utility

mdoc(7) police: utilize the new .Ex macro.

Remove whitespace at EOL.

mdoc(7) police: use the new features of the Nm macro.

Grammar fix: ``Different than'' should really be ``different from''.

$Id$ -> $FreeBSD$

.Sh AUTHOR -> .Sh AUTHORS. Use .An/.Aq.

Add usage().

Revert $FreeBSD$ to $Id$

Sort cross references.

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

delete doubled words, e.g.: "the the" -> "the"

Correct some man page cross references and file location references.

Local changes - manual page extension, and minor man page changes

Process accounting utility by Chris Demetriou.

Obtained from: NetBSD