domainname(1): Grammar fix

Event: Advanced UNIX programming course (Fall'23) at NTHU
Pull Request: https://github.com/freebsd/freebsd-src/pull/1038

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/

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

Point users towards nisdomainname and rc.conf.

PR: 144630
Submitted by: Stefan Krueger <stadtkind2@gmx.de>,
Fel <wtfcrap@mail.ru>

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.

Use a standard section name.

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

Mechanically kill hard sentence breaks.

Remove clause 3 from the UCB licenses.

OK'ed by: imp, core

Use `The .Nm utility'

mdoc(7) police: join OS version with the corresponding macro.

Remove whitespace at EOL.

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

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

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

Use Fx macro wherever possible.

$Id$ -> $FreeBSD$

Clean up some .Os macro uses: quotes are not needed, multiple arguments
don't really work if the first one isn't "FreeBSD", and "FreeBSD-Experimental"
isn't an OS name.

Correct use of .Nm. Add rcsid.

/etc/netstart -> /etc/rc.network
Add usage() and use __progname. Change usage string to match man page.

Revert $FreeBSD$ to $Id$

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.

Submitted by: David Muir Sharnoff
domainame has referenced getdomainname(2) instead of getdomainname(3).
bug report docs/137.

A new domainname(1) command based on hostname(1), this time with a correct
manual page.