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/

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

Remove usage of _WITH_GETLINE from usr.bin

Mark global functions and/or variables in comm(1) static where possible.

This allows compilers and static analyzers to more thorough analysis.

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.

Add SIZE_MAX overflow check

Rewrite input processing to not exit with error on the first EILSEQ found
in the input data but fallback to "binary comparison" instead.

POSIX says: "The input files shall be text files", nothing more,
so the text file with illegal sequence is valid input.
BTW, GNU sort does not fails on EILSEQ too.

- Prevent overflowing of the buffer length variable in getline() by
limiting its maximum value.
- Exit if reallocf(3) fails in getline(). Failure was silently
considered as end-of-file.

Reviewed by: ghelmer
Approved by: trasz (mentor)

Don't read the newline character to line buffer because lines are passed
to wcscoll(3). Newline characters could cause incorrect results when
comparing lines.

Also, if an input line didn't contain a newline character, it was
omitted from the output. According to my interpretation, SUSv3 requires
that the newline is always printed.

Add regression tests for the cases. [1]

PR: bin/140976
Submitted by: D'Arcy Cain (original version) [1]
Approved by: trasz (mentor)

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

Similar to changes previously made to src/usr.bin/uniq/uniq.c,
fix truncation of lines at LINE_MAX characters by dynamically
extending line buffers.

Add support for multibyte characters.

ANSIify function definitions to avoid a warning.
Minor constness changes.

No need to handle '-' explicitly in getopt() loop.

Obtained from: NetBSD

remove __P

Use LC_ALL to pick LC_COLLATE too (for strcoll())

Style improvements recommended by Bruce as a follow up to some
of the recent WARNS commits. The idea is:

1) FreeBSD id tags should follow vendor tags.
2) Vendor tags should not be compiled (though copyrights probably should).
3) There should be no blank line between including cdefs and __FBSDIF.

Use __FBSDID().

WARNS=2 fixup.

Include missing header files which define functions for which gcc has
builtins (e.g., exit, strcmp).

Rework diagnostics text
Remove unused #include

fix the same typo as in uniq

toupper -> tolower to match changed behaviour of new grep case fold

Cosmetique: use standard prototypes scheme
Back out prev change: toupper is more compatible with sort -f

toupper->tolower to match what strcasecmp does

Localize it

PR: 11221
Submitted by: Grigoriy Strokin <grg@philol.msu.ru>

$Id$ -> $FreeBSD$

Tweaks to allow compiling -Wall (mostly adding "const" to char rcsid[]).

Teach comm(1) and uniq(1) about an option for case-insensitive work.

PR: 3042
Submitted by: graphix@iastate.edu (Kent Vander Velden)

Use err(3). Add DIAGNOSTIC section name in man page.

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

Import some parts of CSRG 4.4BSD-Lite2 usr.bin sources to fix tree build.

BSD 4.4 Lite Usr.bin Sources