Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

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

Approved by: wblock
MFC after: 3 days

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

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