Remove copyright strings ifdef'd out

We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals. These copyright strings are present in the comments and
are largely from CSRG's attempt at adding their copyright to every
binary file (which modern interpretations of the license doesn't
require).

Sponsored by: Netflix

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 .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

boottrace: annotate init and shutdown utilities

Add boottrace annotations to record events in init(8), shutdown(8), and
reboot(8).

Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
X-NetApp-PR: #23
Differential Revision: https://reviews.freebsd.org/D31928

shutdown: Fix r327476 by adding init

Initialize maybe_today. While here sort.

PR: 32411
Additionally reported by: rgrimes, ian

shutdown: Assume absolute time is in the future

The original bug describes it best:

When an absolute time is specified to shutdown, the program's
behavior depends on whether that time has passed during the
current calendar day. POLA would suggest that for shutdown,
whose time argument is always supposed to be in the future,
absolute times specified without a specific date should refer
to the next occurrence of that time, rather than erroring out
if that time has already passed during the current day.

PR: 32411
Submitted by: wollman@khavrinen.lcs.mit.edu
Submitted on: 2001-11-30 20:30:01 UTC
Reviewed by: asmodai (at time of bug submission)

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Add -c to the usage statements.

Submitted by: Maxim Konovalov

Add power cycle support (-c) to shutdown.

Sponsored by: Netflix

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

sbin/shutdown: Support time units as in 'shutdown -r +5sec'

Units supported: s, sec, m, min, h, hour.

Differential Revision: https://reviews.freebsd.org/D1272

Restore a piece of BSD history.

PR: 169127
Submitted by: Ruben de Groot <ruben@hacktor.com>
MFC after: 1 week

shutdown: Remove unnecessary 2-second delay.

Replace index() and rindex() calls with strchr() and strrchr().

The index() and rindex() functions were marked LEGACY in the 2001
revision of POSIX and were subsequently removed from the 2008 revision.
The strchr() and strrchr() functions are part of the C standard.

This makes the source code a lot more consistent, as most of these C
files also call into other str*() routines. In fact, about a dozen
already perform strchr() calls.

Add missing static keywords for global variables to tools in sbin/.

These tools declare global variables without using the static keyword,
even though their use is limited to a single C-file, or without placing
an extern declaration of them in the proper header file.

For compatibility with Linux and Solaris add poweroff(8).

It is implemented as a hard link to shutdown(8) and it is equivalent of:

# shutdown -p now

While I'm here put one line of usage into one line of C code so it is easier to
grep(1) and separate unrelated code with empty line.

MFC after: 2 weeks

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.

Add missing `void' for functions without arguments.

While there, rename die_you_gravy_sucking_pig_dog() to something that's
less moronic.

Static'ify internal methods and use prototype.

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

Use new style declarations instead of K&R ones.

Use modern style defination for main() and move a extern
declaration to global section.

Bump WARNS?= to 6

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

Approved by: core, imp

Centralize _PATH_* definitions.

Submitted by: Tim Kientzle <kientzle@acm.org> (embellished by me)

Use __FBSDID() to quiet GCC 3.3 warnings.

o remove __P
o remove main prototype

Constify, de-register-ify, __unused-ify, and set WARNS=2.

Submitted by: Mike Barcroft <mike@q9media.com>

$Id$ -> $FreeBSD$

Avoid ambigious if/else

Signal init(8) instead of executing halt(8) or reboot(8)
when halting or rebooting the system. It benefits from
running /etc/rc.shutdown by init(8).

``-o'' flag is provided for backward compatibility.

PR: 5451
Discussed with: des

Minor cleanups to shutdown(8):

- Make the -k "don't actually halt" flag incompatible with
the halt/reboot options -h, -p, and -r.
- The -n "don't sync" option is ignored if -k is specified.
Issue a warning message.
- Compute the actual shutdown time written to /var/run/nologin
correctly in the case of "now" being specified.

Fix a coredump with negative (due to overflow) offset values.

Merged from Lite2 (one bcopy -> memmove, one significant change:
don't unlink _PATH_NOLOGIN for the -k case even if shutdown terminates
abnormally. NetBSD already has this change).

Fixed missing 'p' and `-' flags and other defects in the usage message.

Fixed some style bugs.

Add a '-p' flag to shutdown which corresponds to the '-p' flag to halt,
requesting a system power-off after shutdown.

Correct use of .Nm. Add rcsid. Do not dot terminate err(3) strings. Spelling.

Pass an actual empty environment to execle() as per POSIX rather than
rely on undocumented behavior.

The following fixes were obtained from OpenBSD:

o -Wall fixes to tlist array initialization and assignment used
as truth value.
o Use a restricted environment.
o Improved error message when shutdown fails to exec reboot or halt.

Added environment parameter to execle calls.

Obtained from: NetBSD PR2737 (augustss@cs.chalmers.se) via OpenBSD

Correct a comment from my last commit.

Allow 'shutdown datespec' to work into the next century. Handle dates
in the 22nd century and beyond even though it's irrelevant with a 32-bit
time_t which expires in the year 2038.

Make the daemon process a true daemon by calling setsid().

PR: bin/3202
Submitted by: Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>

Import Lite2's src/sbin, except for XNSrouted and routed. All relevant
files in src/sbin are off the vendor branch, so this doesn't change the
active versions.

Use err(3).

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

-n was broken

2.2 candidate (probably)

Delete bogus referneces to timezone code internal header file `tzfile.h',
which is no longer bogusly installed in /usr/include.

Yanked out (now obsolete) support for 'fastboot'.

Submitted by: M.C. Wong
Obtained from:
Don't throw away the /etc/nologin file in the -k case.

BSD 4.4 Lite sbin Sources

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