usr.bin: 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

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

enigma(1) Remove reference to PGP; modernize a bit

- the port was removed 2017-06-07 in r442847
- gnupg1 is the older version of gpg with legacy PGP support
- remove unused macro
- remove now-false statement about export restrictions

Explicitly crypt_set_format("des") and bail out if we
can't. This would prevent problem when we changed the
default crypt(3) algorithm or removed it in the future.

PR: bin/189958
MFC after: 1 month

Handle NULL return from crypt(3). Mostly from DragonFly

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

This allows compilers and static analyzers to 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.

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

Fix 32-bit integer math on 64-bit processor. Just use int32_t(!) instead
of incorrect and machine-dependent integer math. Now we can encrypt a file
on an i386 and decrypt it on an amd64, and vice versa.

Submitted by: Andrew Heybey < ath at niksun dot com >

Call crypt() directly instead of taking a detour through makekey.

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

Consistently use FBSDID

Fix the type of the NULL arg to execl()

Idea from: Theo de Raadt <deraadt@openbsd.org>

Silence -Wshadow and -Wmissing-prototypes; set WARNS=2.

Submitted by: Mike Barcroft <mike@q9media.com>

Remove unwanted CFLAGS, and add a CVS id.

Fix some of the more blatant bugs in the original code, provide a
BSD-able Makefile, add a man page (that also puts a bold warning about
the weakness of the encryption), and implement the -k option for
compatibility with other vendor's implementations. (Unlike those
other vendors, we actually also document this option and its
problems.)

There are more violations of style(9) in it, like the not-use of
getopt(3), but it's not worth the while fixing all of this.

This is enigma, aka. crypt(1). It has suppsedly been taken from
Cryptbreakers Workbench. While arguably a rather weak encryption,
it's in some use in the Internet still, and provided by a bunch of
other Unix systesms, so we include it here for compatibility.

Silently agreed by: core