at.man: Move examples to the EXAMPLES section

MFC after: 3 days

at.man: Fix mdoc(7) macro usage

MFC after: 3 days

Remove $FreeBSD$: one-line nroff pattern

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

at(1): Markup environment variables with proper macros

Submitted by: debdrup
Reported by: 0mp
Reviewed by: imp
Sponsored by: Klara Inc.
Differential Revision: https://reviews.freebsd.org/D25721

at(1): Fix location of at(1) crontab

With r318443, atrun was moved from /etc/crontab to /etc/cron.d/at,
but the man-page was unfortunately not updated to reflect this.

PR: 248048
Submitted by: debdrup
Reported by: yoitsmeremember+fbsd at gmail.com
Reviewed by: Pau Amma <pauamma at gundo.com>
Sponsored by: Klara Inc.
Differential Revision: https://reviews.freebsd.org/D25709

- Correct the description when jobs are executed related to load avg
to match reality (slightly different to what was submitted in the
PR: use english word instead of math-symbol).
- Wrap the corresponding part to below 80 characters per line.

Submitted by: yamagi@yamagi.org
PR: 202202
Sponsored by: Essen Hackathon

at.man: Bump .Dd missed in r334502

Sponsored by: Dell EMC Isilon

Update other man pages to match leap second reality

Missed these in r334501; see justification there:

https://svnweb.freebsd.org/base?view=revision&revision=334501

Sponsored by: Dell EMC Isilon

use .Mt to mark up email addresses consistently (part3)

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

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.

Remove stale references to utmp(5) and its corresponding filenames.

I removed utmp and its manpage, but not other manpages referring to it.

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

Sort sections.

Explain the format of the at.allow and at.deny files in detail.

PR: 35942
Submitted by: Gary W. Swearingen <swear@blarg.net>

The .Nm utility.

mdoc(7) police:

Revert to using the .Tn POSIX and .Tn ANSI instead of \*[Px] and \*[Ai]
strings; using these strings is unsafe in troff mode, as they include a
change in a font size.

Approved by: re

mdoc(7) police: Removed redundant .Ns calls.

mdoc(7) police: lint.

Add the SUSv3 -l option to at. This is an alias for atq. Allow job ids
to be specified on the command line for which information should be reported.

Submitted by: Joe Halpin <joe.halpin@attbi.com>
Reviewed by: mike

Document the fact that at(1) is run through cron(8) and that this affects
the granularity of the at queue runs.

Submitted by: mux

mdoc(7) police: markup fixes.

o Remove the -V [version number] option, since our version of at(1) no
longer resembles the original.
o Remove references to `you' in the manual.

Submitted by: Joe Halpin <joe.halpin@attbi.com>

Fix a typo introduced in the previous delta. The mistake was mine
rather than the submitter's.

Implement the POSIX 1003.1-2001 -r and -t options in at(1). Fix some
minor issues in the rest of the source and manual.

Submitted by: Joe Halpin <joe.halpin@attbi.com>
Obtained from: touch(1) (partially)
MFC after: 1 month

- Add 4-digit year variants in the manpage, since at(1) already
understands them.

PR: docs/32843
Submitted by: Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>

mdoc(7) police: kill whitespace at EOL and HSB.

Use .Nm to correctly display the program name.

PR: docs/32086
Submitted by: setantae@submonkey.net
MFC After: 2 days

An empty at.deny doesn't mean everyone can use at.

PR: 29549
Submitted by: swear@aa.net

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

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

Prepare for mdoc(7)NG.

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

Typo

Change the usage of the .Nm macro in the NAME section to be
consistent with the rest of the system.

Correct use of .Nm, .Em, .Ev
Add rcsid. Use errx instead of fprintf + exit.
Various spelling fixes.

$Id$ -> $FreeBSD$

1. Add support for months and years in relative time spec (now + 1 year)

2. Rip out dateadd() and re-do the plus operator handler to use mktime()
instead (per wollman).

Reviewed by: wollman

Various man page cleanup:

- Sort xrefs
- Be consistent with section names as outlines in mdoc(7).
- Other misc mdoc cleanup.

PR: doc/13144
Submitted by: Alexey M. Zelkin <phantom@cris.net>

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.

Fix a bunch of spelling errors.

PR: 6856
Submitted by: Josh Gilliam <josh@quick.net>

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

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.

Describe the correct default situation for the various permission
options.

Submitted by: sgk@troutmask.apl.washington.edu (Steven G. Kargl)

Upgrade to 2.9

Make parsetime.c more consistent by using the (already declared) enum
type instead of int all over the place. (Cosmetic, enhances
debugging.)

Point out that a date specification _must_ follow the time of day
spec, in the man page. This clarifies the last point PR # of bin/483:
"at doesn't seem to ..." (the remainder has already been fixed with
version 1.3 of parsetime.c).

Upgrade.