usr.bin: 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/

Update manpage date to when the deprecation notice was removed.

Reported by: bcr

rwho/ruptime/rwhod shouldn't be gated by RCMDS.

As peter@ points out in pr/220953:
"rwho, rwhod and ruptime are not part of the remote login suite (rsh, rlogin
etc).

They should *not* be in the rcmds package which is disabled by default. We
rely on rwho/rwhod/ruptime in the freebsd.org cluster."

This commit is a re-commit of r322029 and r322031 with a better commit log, as
pointed out by ngie@.

This also includes the necesary changes to OptionalObsoleteFiles.inc, as
requested by jhb@.

PR: 220953
Reported by: peter@, jhb@
Differential Revision: https://reviews.freebsd.org/D11743

Revert r322029 and r322031 so as to recommit them with a better commit log.

PR: 220953
Reported by: ngie@

Remove deprecation notice for ruptime/rwho/rwhod.

PR: 220953
Reported by: peter

Add deprecation notices for all rcmd tools

Submitted by: bcr
Reviewed by: emaste, bapt, jhl
MFC after: immediate
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D11471

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

Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with: imp, rwatson

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.

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

It's actually 11 minutes when the machine is assumed to be down and removed
from the output.

Obtained from: DragonFlyBSD

Expand *n't contractions.

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

Get rid of hard sentence break
Asked by: Sheldon

Add section number to .Xr references. Enumerate flags the standard way.

$Id$ -> $FreeBSD$

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

.\" $Id$
.\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by: bde

Fixed typo.

Use err(3). Add usage() and prototypes. Add Xr to who(1).

Fix some incorrect locations in the FILES sections of some man pages.

BSD 4.4 Lite Usr.bin Sources