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/

Sync with OpenBSD.

bc.y: Rev 1.50
- write parse errors to stderr, prompted by Martijn Dekker
- we're only interactive if stdout en stderr are a tty as well as stdin

PR: 234430
Obtained from: OpenBSD
MFC after: 1 week

bc/dc/patch: make some use of reallocarray(3).

reallocarray(3) is a non portable extension from OpenBSD. Given that it is
already in FreeBSD, make easier future merges by adopting in some cases
where the code has some shared heritage with OpenBSD.

Obtained from: OpenBSD

bc(1): Fix memory corruption issues

Fix crashes and hangs found by AFL.
Improve handling of non-ascii chars.

Obtained from: OpenBSD (CVS rev 1.49)

bc: sync with OpenBSD

tty.c Rev. 1.3
Avoid unintended problems with operator precedence when doing an
assignment and comparison.

bc.1, Rev. 1.31, 1.32
'.Ql Quit' -> '.Ql quit' because only the lowercase command is valid.
Clarify sentence about `quit` in BUGS section.

extern.h, Rev. 1.12
whitespace

bc.y, Rev. 1.47
Prefer setvbuf() to setlinebuf() for portability

Obtained from: OpenBSD
MFC after: 2 weeks

Sync with OpenBSD.

MFC after: 2 weeks

Remove mention of the compatibility option 'q', which is
intentionally undocumented and its only purpose is that
we do not bail out when used as a drop-in replacement of
a different implementation.

PR: docs/184550
MFC after: 2 weeks

Make definition match declaration

Approved by: cperciva
MFC after: 3 days

Fix world after byacc import:
- old yacc(1) use to magicially append stdlib.h, while new one don't
- new yacc(1) do declare yyparse by itself, fix redundant declaration of
'yyparse'

Approved by: des (mentor)

- Fix an erroneous invocation of the editline.
- Fix wrong scaling in the bc.library.
- Let length(0.000) conform to what gnu bc does.

PR: bin/159227
Submitted by: AIDA Shinra <shinra at j10n dot org>

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.

Use libedit when interacting with tty, which provided history
functionality, etc. as did by GNU bc.

This also fixes an issue where BSDL bc can not handle very long
line.

Reported by: imp
Reviewed by: imp

- style(9)

Approved by: delphij (mentor)

- Remove --debug option and intentionally undocument -d, which is only
kept for compatibility with 4.4BSD behavior.
- Sync SYNOPSIS with usage().
- Use an alternative way to represent short and long options which have
same semantics.

Reviewed by: gabor

Replace GNU bc/dc with BSDL versions ported from OpenBSD. They have a good
compatibility level with the GNU counterparts and have shown to be mature
enough. For now, the GNU versions aren't removed from the tree, just detached
from the build.

Sponsored by: Google Summer of Code 2008
Portbuild run by: erwin
Approved by: delphij