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/

realpath(1): Add EXAMPLES section.

Add a small example for this simple command.

Approved by: manpages (gbe@)
Differential Revision: https://reviews.freebsd.org/D26863

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

Make ``realpath'' behave like ``realpath .''.

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.

Enhance realpath(1) in a number of ways:

- Allow realpath to accept multiple paths on the command line.
- Add -q to suppress warnings if some paths can't be processed, and use
getopt(3) to process flags.
- Print the path being requested rather than a possibly partially
processed path when a failure occurs so that you can tell which of
several passed paths did fail.

MFC after: 1 week
PR: 112920
Submitted by: Ighighi <ighighi@gmail.com>

Add the new standard EXIT STATUS section where appropriate.
Sort standard sections in the (documented) preferred order.

/*- or .\"- or #- to begin license clauses.

Remove clause 3 from the UCB licenses.

OK'ed by: imp, core

Use `The .Nm utility'

mdoc(7) police: utilize the new .Ex macro.

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

Move the realpath(1) birth day from FreeBSD 5.0 to FreeBSD 4.3.

Submitted by: "Stephen L. Palmer" <slpalmer@mail.com>
Forgotten by: asmodai

mdoc(7) police: minor fixes.

Let the pwd program double as realpath(1).

This lets you resolve pathnames to their underlying physical path:

critter# realpath /sys/kern/subr_disk.c
/freebsd/src/sys/kern/subr_disk.c

Update the pwd man-page slightly.