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.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/

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

Use NULL instead of 0 for pointers.

fopen(3) will return NULL in case it can't open the STREAM.
The malloc will return a pointer to the allocated memory if successful,
otherwise a NULL pointer is returned.

Also add an extra DEBUG1 to print out the error to open a file.

Reviewed by: ed
Differential Revision: https://svnweb.freebsd.org/changeset/base/297959

Mark global functions and/or variables in rmt(8) static where possible.

This allows compilers and static analyzers to do more thorough analysis.

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.

ANSIfy some more tools in usr.sbin/.

Most of these tools build with WARNS=6, except for their use of K&R
function declarations.

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

Per letter dated July 22, 1999 remove 3rd clause of Berkeley derived software
(with permission of addtional copyright holders where appropriate)

There is no need to #include <sgtty.h>

Use __FBSDID over rcsid[]. Protect copyright[] where needed.

WARNS=4, de-__P()

atol -> strtoll, for file offset

Use STD{ERR,IN,OUT}_FILENO instead of their numeric values. The
definitions are more readable, and it's possible that they're
more portable to pathalogical platforms.

Submitted by: David Hill <david@phobia.ms>

Minimum necessary change: return no more than 24 bytes of data for the
'S' status call- this was the size of the original mtget structure. Don't
bother to map the current mtget structure to an old one- for version 0
RMT it's meaningless because it's all binary data anyway, and it's only the
wierd edge case of Solaris 7 starting to use the 'S' status call that has
tickled this issue- and this MNC fixes that issue.

We need to implement Version 1 RMT anyway.

Approved: jkh@freebsd.org

PR: 14946

$Id$ -> $FreeBSD$

Add support for the 'V'ersion rmt command.

Hide sccsid[]. Typo in man page.

Buffer overflow from OpenBSD:
Rev 1.3 millert:
Fix potential buf oflow wrt strerror and sprintf.
Obtained from: OpenBSD

The rmt protocol didn't allow to pass a file creation mode (permission
bits) along, and rmt did the wrong thing in calling open(2) with random
garbage as third parameter. Make it create new files with 0666
(modified by the umask of the remote shell anyway).

This removed the last show-stopper from tar not working with remote
archives.

BSD 4.4 Lite usr.sbin Sources