at cron file is now in /etc/cron.d

PR: 243380
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1106

Remove $FreeBSD$: one-line nroff pattern

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

Call /etc/crontab the "system crontab", not "root's crontab". While
here, fix some other wording issues

PR: 201048
Submitted by: teksimian@gmail.com
MFC after: 1 week

atrun(8): scale default load average limit with the number of CPUs

Previously atrun refused to run jobs if load average was not below fixed limit of 1.5.

PR: 173175
Reviewed by: peterj
Approved by: trasz (mentor)
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.

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

Note PAM support in atrun(8).
Sort FILES section while there.
Touch document date.

Removed trailing whitespace.

mdoc(7) police: Deal with self-xrefs.

mdoc(7) police: removed HISTORY info from the .Os call.

mdoc(7) police: split punctuation characters + misc fixes.

mdoc(7) police: removed history info from the .Os FreeBSD call.

$Id$ -> $FreeBSD$

Clean up some .Os macro uses: quotes are not needed, multiple arguments
don't really work if the first one isn't "FreeBSD", and "FreeBSD-Experimental"
isn't an OS name.

Clean up grammar. Provide proper pathnames for spool directories.
Document dependency on current load average for starting new batch jobs.

PR: 7109

Cosmetic in error strings. Sort Xrefs. Add usage (with syslog capability).

Revert $FreeBSD$ to $Id$

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.

Upgrade.
Close security holes reported.