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 $FreeBSD$: two-line .c pattern

Remove /^#include\s+<sys/cdefs.h>.*$\n\s+__FBSDID\("\$FreeBSD\$"\);\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

Convert `cap_enter() < 0 && errno != ENOSYS` to `caph_enter() < 0`.

No functional change intended.

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 the duplicated code using Capsicum helpers.

Reviewed by: cem, ed, bapt, emaste
Differential Revision https://reviews.freebsd.org/D8140

Move sys/capsicum.h includes after types.h or param.h

This is not actually documented or even implied in style(9). Make the change
to match convention. Someone should document this convention in style(9).

Reported by: jhb
Sponsored by: EMC Dell Isilon

tr(1): Capsicumify

This is a straightforward single input, single output program for
capsicum.

Reviewed by: bapt
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D7928

Optimize [Cc]flag case: don't repeatedly add the last character of
string2 to squeeze cset when string2 reach its EOS state.

Back out non-collating [a-z] ranges (r302594).
Instead of changing the whole course to another POSIX-permitted way
for consistency and uniformity I decide to completely ignore missing
regex fucntionality and focus on fixing bugs in what we have now,
too many small obstacles we have choicing other way, counting ports.
Corresponding libc changes are backed out in r302824.

Fully back out r302594 case 2) since overflow may happens.

Undo r302599 and partially r302594 case 2):
since WCHAR_MAX can be not a valid wchar value, it is easier to stay
inside wint_t.

Cast WCHAR_MAX to wint_t, it can be unsigned on some systems.

1) Following r302512 (remove collation support for [a-z]-ranges in libc)
remove collation support for a-z ranges here too.
It was implemented for single byte locales only in any case.

2) Reduce [Cc]flag loop to WCHAR_MAX, WINT_MAX here includes WEOF which is
not a character.

3) Optimize [Cc]flag case: don't repeatedly add the last character of
string2 to squeeze cset when string2 reach its EOS state.

4) Reflect in the manpage that [=equiv=] is implemented for single
byte locales only.

When copying the complement of the string loop to WINT_MAX as we are dealing
with a wint_t. WINT_MAX and WCHAR_MAX are the same on most architectures
except ARM EABI where wint_t is signed and wchar_t is unsigned.

Add missing static keywords to tr(1)

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.

Revert most part of 200420 as requested, as more review and polish is
needed.

Remove unneeded header includes from usr.bin/ except contributed code.

Tested with: make universe

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

Remove unused variables.

Report input errors instead of ignoring them.

Add support for multibyte characters. The challenge here was to use
data structures that scale better with large character sets, instead of
arrays indexed by character value:
- Sets of characters to delete/squeeze are stored in a new "cset" structure,
which is implemented as a splay tree of extents. This structure has the
ability to store character classes (ala wctype(3)), but this is not
currently fully utilized.
- Mappings between characters are stored in a new "cmap" structure, which
is also a splay tree.
- The parser no longer builds arrays containing all the characters in a
particular class; instead, next() determines them on-the-fly using
nextwctype(3).

Special fix just for
tr -[cC]s '[:upper:]' '[:lower:]'
case (or vice versa):
chars taken from s2 can be different this time
due to lack of complex upper/lower processing,
so fill string2 again to not miss some.

Microoptimization of prev. patch: do strdup() only if (cflag || Cflag)

1) Fix -C - it was broken since introduced, wrong array sorted
2) Fix last (repeated) char after [:class:], it was \0 in original code

Remove charcoll() stabilization added in 1.16, it gains nothing but conflicts
with ranges.

This patch address two problems.

1st one is relatively minor: according our own manpage, upper and lower
classes must be sorted, but currently not.

2nd one is serious:
tr '[:lower:]' '[:upper:]'
(and vice versa) currently works only if upper and lower classes
have exact the same number of elements. When it is not true, like for
many ISO8859-x locales which have bigger amount of lowercase letters,
tr may do nasty things.

See this page
http://www.opengroup.org/onlinepubs/007908799/xcu/tr.html
for detailed description of desired tr behaviour in such cases.

ANSIify function definitions.
Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.

Reviewed by: md5

When translating and -C is specified, behave as if the complemented set was
in the locale collating order as required by SUSv3.

When translating and the -c option is specified, handle the case where the
second string argument is more than one character in length in the way
required by SUSv3 (and the way GNU textutils and SVR4 do it).

Add the P1003.1-2001 -C option which complements the set of characters
(not byte values) specified by the first string argument.

Implement support for equivalence classes ([=e=]) when the mapping is
one-to-one (SUSv3)

remove __P

properly handle zero length first string when doing -c

PR: 34663
MFC After: 3 days

WARNS=2 fixes, use __FBSDID(), kill register keyword.

$Id$ -> $FreeBSD$

Submitted by: Joachim Kuebart, thanks.
Add -u option to force unbuffered output

Use err(3) instead of local redefinition. Cosmetic in usage().

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

Merge from Lite2

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

Fix broken charclass handling
Add setlocale LC_CTYPE

Remove trailing whitespace.

BSD 4.4 Lite Usr.bin Sources