sbin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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

Purge more stray embedded $FreeBSD$ strings

These do not use __FBSDID but instead use bare char arrays.

Reviewed by: imp, emaste
Differential Revision: https://reviews.freebsd.org/D41957

Clean up global variable declarations in the dump and restore
utilities so that they will compile with -fno-common.

Started by: Kyle Evans (kevans)
Reviewed by: Kyle Evans (kevans)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D24210

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

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.

Fixed unformatting of copyright clause 4 in previous commit.

Remove advertising clause from University of California Regent's license,
per letter dated July 22, 1999.

Approved by: core, imp

Make this WARNS=2 clean by
- using (intmax_t) and %j
- giving a non-empty format string to msg()

Include <stdint.h> directly instead of depending on <inttypes.h>
to do it.

Tested by: make universe

De-Kerberise (KerberosIV). KerberosIV is no longer present, and
remote backups can still be done with Kerberos authentication using
SSH and Kerberos 5.

Use the standardized CHAR_BIT constant instead of NBBY in userland.

o remove __P
o Use ANSI function definitions
o unifdef -D__STDC__

Zap a number of #ifdef sunos blocks, and all of the `register'
keywords.

Add include of errno.h where needed, remove extern int errno where not.

These commits were inspired by a similar commit to netbsd.

$Id$ -> $FreeBSD$

Add support for dealing with ENOSPC as the error code returned by a tape
device hitting EOM on a write.

Make `dump' exit codes confirm to manual page.

PR: 5346
Style-check-by: bde

Correct use of .Nm. Add rcsid. Remove unused #includes.

Turn on TCP_NODELAY on the remote socket, to turn off sender silly window
syndrome avoidance. The combination of SWS avoidance and ack-every-other
causes low throughput if the block size divided by the MSS is odd (which
is true with the default block size and MSS).
Turning on TCP_NODELAY disables the Nagle algorithm and sender SWS avoidance.
The rdump request/response protocol can not invoke Nagle and cannot cause
SWS, so this has no negative effects.

Implement Kerberized rcmd for rdump/rrestore. This is lacking the
options one would normally expect to set the realm, enable encryption,
and whatnot, but this actually is able to contact the remote server,
so at least it's a start. (As a bonus, the stripped static binary is
unquestionably exportable.)

Merge Lite2 changes (rather bigish, the dump/restore folks should check)

Import some CSRG 4.4BSD-Lite2 components for sbin onto vendor branch.
(note that some of these have already been imported, this is a no-op)

Fix many buffer overflows, correct usage of strcat and implement
$TAPE. Inspired by OpenBSD's work in this area.

Reviewed by: Peter Wemm, Guido van Rooij and Jordan Hubbard.
Obtained from: OpenBSD

Use fprintf(stderr,) instead of msgtail() so it works for restore as well.

Temporarily disable an information message that was added in the last
commit.. This causes a link error in sbin/restore which also uses this
file.

Make rdump error messages a little clearer and make them look like dump
messages, and make it explicit that stderr output came from the remote end.
(e.g. "rmt: command not found")

If rcmd() fails, return immediately instead of trying a bunch of
setsockopt()'s on a -1 file descriptor.

Remove attempt to decrease TCP MSS; it makes no sense.

Set the IP TOS to IPTOS_THROUGHPUT as an indication that this is an
application sending large blocks of data, as recommended by RFC1700.

Andreas Klemm's patch set for dump(8), with some minor (cosmetic)
changes and one addition by me.

. Use reasonable defaults for the tape drive (/dev/rst0) instead of
something we actually don't have.

. Add a summary line displaying the alapsed time and the total throughput.

. Replace "rmt" for the remote location of rmt(8) by "/etc/rmt", since this
is the historical protocol, and relying on the $PATH causes a big pain.
Make it adjustable via an environmental variable though.

Reviewed by: joerg (for Andreas' part)
Submitted by: andreas@knobel.gun.de (Andreas Klemm)

BSD 4.4 Lite sbin Sources

Note: XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.