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 O_SYNC from the options passed to dbmopen().

The output file is created as a temporary file that is moved over the
existing file after completion. Thus there is no need to immediately
flush all created db records to the temporary file.

This speeds up creation of the termcap db by a factor of 40 on my
ZFS based /etc filesytem (from 25 seconds to 0.6 seconds).

I have compared multiple output files created with and without O_SYNC
and they came out identical each time. Nonetheless it might be best
to MFC this change and the similar one for services_mkdb (r295465) at
the same time when the changes to hash.c in review D5186 are merged.

MFC: 1 week

Make cap_mkdb and services_mkdb file operations sync

Similar fix was done for passwd and group operations in r285050. When a
temporary file is created and then renamed to replace official file there
are no checks to make sure data was written to disk and if a power cycle
happens at this time, system can end up with a 0 length file

Approved by: bapt
MFC after: 1 week
Sponsored by: Netgate
Differential Revision: https://reviews.freebsd.org/D2982

Add missing static keywords to cap_mkdb(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.

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

Add endianness support to cap_mkdb(1), useful for cross builds.

Fixate the hash bucket size to 4K. We were using the default,
which is stat.st_blksize (i.e., PAGE_SIZE).

This change causes the .db files that were cross-compiled on
another platform to be identical to the natively built ones.

Tested on: alpha->amd64 build

ANSIify function definitions to avoid a warning.

remove __P

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().

Silence a warning on the Alpha.

Reviewed by: md5(1)

Don't treat the pipe symbol in capabilities as an alternate
record name indicator; this causes a spurious warning:

$ cat x
record:\
:capability=|value:
$ cap_mkdb x
cap_mkdb: ignored duplicate: record

Spotted by: dcs

Make better use of .Ar. Use DIAGNOSTICS instead of incorrect section name.
Add rcsid. Remove unused #includes. Cosmetic in error messages.

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

Fixed printf format errors.

Fixed printf format errors.

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.

BSD 4.4 Lite Usr.bin Sources