Remove $FreeBSD$: two-line nroff pattern

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

Add idle priority scheduling privilege group to MAC/priority

Add an idletime user group that allows non-root users to run processes
with idle scheduling priority. Privileges are granted by a MAC policy in
the mac_priority module. For this purpose, the kernel privilege
PRIV_SCHED_IDPRIO was added to sys/priv.h (kernel module ABI change).

Deprecate the system wide sysctl(8) knob
security.bsd.unprivileged_idprio which lets any user run idle priority
processes, regardless of context. While the knob is still working, it is
marked as deprecated in the description and in the man pages.

MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D33338

MAC/priority module for realtime privilege group

This is a MAC policy module that grants scheduling privileges based on
group membership. Users or processes in the group realtime (gid 47) are
allowed to run threads and processes with realtime scheduling priority.
For timing-sensitive, low-latency software like audio/jack, running with
realtime priority helps to avoid stutter and gaps.

PR: 239125
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D33191

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

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

Document the security.bsd.unprivileged_idprio in idprio(1) in addition
to rtprio(2).

Approved by: wblock
MFC after: 3 days

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

mdoc: move CAVEATS, BUGS and SECURITY CONSIDERATIONS sections to the
bottom of the manpages and order them consistently.

GNU groff doesn't care about the ordering, and doesn't even mention
CAVEATS and SECURITY CONSIDERATIONS as common sections and where to put
them.

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.

Sort sections.

Added the EXIT STATUS section where appropriate.

Eliminate macro calls inside literal displays.

Mechanically kill hard sentence breaks.

Use `The .Nm utility'

Remove whitespace at EOL.

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

mdoc(7) police: do not split author names in the AUTHORS section.

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

Use Fx macro wherever possible.

Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.

Use DIAGNOSTICS instead of incorrect section name

$Id$ -> $FreeBSD$

Fix a bunch of broken cross-references

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

Update man page to note that idleprio can't be used by normal
users either.

Fix a couple of stray apostrophes.

Use err(3). Sync usage string and man page.

Oops, had a couple of extra parens in a couple of lines.

Clean this man page up. Don't use hardcoded font escape codes.
Other mdoc cleanup.

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.

Use the .Fx macro where appropriate.

Correct a bunch of man page cross references and generally
try and silence "manck".

ncurses, rpc, and some of the gnu stuff are still a big mess, however.

Fix a bunch of spelling errors in a bunch of man pages.

"idle priority" support. Based on code from Henrik Vestergaard Draboel,
but substantially rewritten by me.

Clean up typos in this manpage.

rtprio(1) utility to modify realtime priority of a process.

Submitted by: Henrik Vestergaard Draboel