sbin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

Remove $FreeBSD$: one-line nroff pattern

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

mount_unionfs: remove jokey cautions from man page

There are known issues with unionfs, and the mount_unionfs man page has
a cautionary statement about its use. The caution had additional
"humourous" statements like "BEWARE OF DOG" but they served only to
confuse the situation. Remove them.

MFC after: 1 week
Sponsored by: The FreeBSD Foundation

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

Note the change of name in FreeBSD 5.0.

PR: 212542
Approved by: bcr (mentor)
MFC after: 4 days
Differential Revision: https://reviews.freebsd.org/D8105

Fix markup.

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

use .Mt to mark up email addresses consistently (part1)

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

Remove trailing whitespace per mdoc lint warning

Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days

Fix SYNOPSIS.

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

Add a notice to the man page that batteries should be installed.

Allowed unionfs to use whiteout not supporting file system as
upper layer. Until now, unionfs prevents to use that kind of
file system as upper layer. This time, I changed to allow
that kind of file system as upper layer. By this change, you
can use whiteout not supporting file system (e.g., especially
for tmpfs) as upper layer. It's very useful for combination of
tmpfs as upper layer and read only file system as lower layer.

By difinition, without whiteout support from the file system
backing the upper layer, there is no way that delete and rename
operations on lower layer objects can be done. EOPNOTSUPP is
returned for this kind of operations as generated by VOP_WHITEOUT()
along with any others which would make modifica tions to the
lower layer, such as chmod(1).

This change is suggested by ed.

Submitted by: ed

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.

Added whiteout behavior option. ``-o whiteout=always'' is default mode
(it is established practice) and ``-o whiteout=whenneeded'' is less
disk-space using mode especially for resource restricted environments
like embedded environments. (Contributed by Ed Schouten. Thanks)

Submitted by: Masanori Ozawa <ozawa@ongs.co.jp> (unionfs developer)
Reviewed by: jeff, kensmith
Approved by: re (kensmith)
MFC after: 1 week

Fix wrong markup and some wordsmithing.

Submitted by: ru

Many, many thanks to Masanori OZAWA <ozawa@ongs.co.jp>
and Daichi GOTO <daichi@FreeBSD.org> for submitting this
major rewrite of unionfs. This rewrite was done to
try to solve many of the longstanding crashing and locking
issues in the existing unionfs implementation. This
implementation also adds a 'MASQUERADE mode', which allows
the user to set different user, group, and file permission
modes in the upper layer.

Submitted by: daichi, Masanori OZAWA
Reviewed by: rodrigc (modified for minor style issues)

Sort sections.

Scheduled mdoc(7) sweep.

Mention the vfs.usermount sysctl.

Obtained from: NetBSD via DragonFly BSD
MFC after: 3 days

Mechanically kill hard sentence breaks.

Remove advertising clause from University of California Regent's license,
per letter dated July 22, 1999.

Approved by: core, imp

Uniformly refer to a file system as "file system".

Approved by: re

s/filesystem/file system/g as discussed on -developers

The .Nm utility

Remove whitespace at EOL.

Missed one mount_null(8) -> mount_nullfs(8) in previous commit.

Rename (after a repo-copy) some mount(8) programs:

mount_fdesc -> mount_fdescfs
mount_null -> mount_nullfs
mount_portal -> mount_portalfs
mount_umap -> mount_umapfs
mount_union -> mount_unionfs

mdoc(7) police: Er macro usage cleanup.

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

Use Fx macro wherever possible.

$Id$ -> $FreeBSD$

User reports that using mount_null destroyed his filesystem, I reply
that nullfs really doesn't work, he askes why this isn't noted for the
"dangerous" filesystems, I go "hmmm."

.Nm mount_union -> .Nm.

Fixed an example.

Another round of various man page cleanups.

BSD 4.4 Lite sbin Sources

Note: XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.