Remove $FreeBSD$: two-line nroff pattern

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

mark this function as deprecated, and put the warning first, since I
doubt most people will read to the end... Note the use of sys/cdefs.h
for pre-C11 compilers...

I didn't included a note about being compatibile w/ userland since a
C11 feature should be obviously usable in userland...

Suggested by: imp

The implementation note isn't true anymore..

Not that anyone reads it, but those that do, remind them that this
isn't usable in userland... I can't wait till this doc is wrong..

use .Mt to mark up email addresses consistently (part6)

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.

mdoc: order prologue macros consistently by Dd/Dt/Os

Although groff_mdoc(7) gives another impression, this is the ordering
most widely used and also required by mdocml/mandoc.

Reviewed by: ru
Approved by: philip, ed (mentors)

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 a note that CTASSERT() should not be used in header files.

Assorted mdoc(7) fixes.

Add a manual page for the CTASSERT(9) macro.

Approved by: des (mentor), re (scottl)