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

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 .c pattern

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

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

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.

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 ktrace(1) build cleanly at WARNS level 6 by completely rethinking the
way in which it handles the -C, -c, -g and -p options.

MFC after: 3 weeks

Remove duplicated header files

Teach kdump to understand sv_flags records in the trace files.

MFC after: 1 Month.

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.

Spell -t option's argument by name.

Fix usage string.

Allow the -c -f file options to actually execute.

When opening a trace file, open O_NONBLOCK so that ktrace doesn't stall
if the target is a fifo. After opening a trace file, check that it is a
regular file, and if not, return an error.

MFC after: 3 days
Reported by: kris
PR: 94278

Do not start err(3) strings with uppercase nor dot terminate them.
Standard sccsid[] area according to style(9).

Consistently use FBSDID

Warnings fix; ANSIfy, constify, mark unused function parameter(s).

1) Clean up vendor and ID strings.
2) include stdlib.h for atoi.
3) staticise and constify.
4) add some missing prototypes.
5) add some parens to keep gcc happy.

remove __P

Sync manpage and usage. Also fix bug that would always interpret a -c as a
process clear.

PR: bin/15456
MFC after: 2 weeks

getopt and friends are declared in <unistd.h>
getopt returns -1 not EOF.

Don't call err() with no format string.

$Id$ -> $FreeBSD$

Cosmetic in usage string.

Finish importing Lite2's src/usr.bin, except for ex, diff, grep, mail,
pascal and vmstat.sparc. All changed files on the vendor branch should
already have been imported.

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

Fix a security problem where the ktrace.out file could have been written
over a file owned by someone else.

Pointed out by: wosch
Reviewed by: sef, imp, proff@suburbia.net, bde

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.

The userland change to the utrace(2) call.

Do always create ktrace.out with mode 0600, to prevent it from
accidentally compromising information confidential to the user running
ktrace.

Merged in 4.4Lite2 versions, added $Id$'s. The ktrace changes should
fix the garbage error messages printed out under certain circumstances.

Remove trailing whitespace.

Reviewed by:
Submitted by:
Put in a signal handler to catch the SIGSYS signal that indicates that
ktrace was not built into the kernel and prevent ktrace to core dump
somewhere.

BSD 4.4 Lite Usr.bin Sources