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/

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

Delete dead code in chat(8)

It's always been dead, ever since first import in 1994. It's still dead in
OpenBSD's version, too.

Reported by: Coverity
CID: 270586
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp

Fix off by one error that overflowed the rep_len array when doing
the final NUL termination.

Reported by: Coverity
CID: 1007617
MFC after: 1 week

chat(8): use NULL instead of zero for initializing a pointer.

More -Wmissing-variable-declarations fixes.

In addition to adding `static' where possible:

- bin/date: Move `retval' into extern.h to make it visible to date.c.
- bin/ed: Move globally used variables into ed.h.
- sbin/camcontrol: Move `verbose' into camcontrol.h and fix shadow warnings.
- usr.bin/calendar: Remove unneeded variables.
- usr.bin/chat: Make `line' local instead of global.
- usr.bin/elfdump: Comment out unneeded function.
- usr.bin/rlogin: Use _Noreturn instead of __dead2.
- usr.bin/tset: Pull `Ospeed' into extern.h.
- usr.sbin/mfiutil: Put global variables in mfiutil.h.
- usr.sbin/pkg: Remove unused `os_corres'.
- usr.sbin/quotaon, usr.sbin/repquota: Remove unused `qfname'.

Make sure that each va_start has one and only one matching va_end,
especially in error cases.

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.

Merge revisions 1.10 and 1.11 from DragonFly:

- Use real getopt() handling instead of the hand-rolled and
IOCCC-worthy "Micro getopt()" macros, plus clean up to the
option handling code:
* Sort the options in the switch statement;
* Plug piddling memory leaks when processing repeated options
by freeing strings before allocating them for a second time;
* Die with a fatal error if the requested report file cannot
be opened for appending;
* Don't call init() before usage() (to prevent the usage
message being mangled by changes to the terminal settings;)
- Clean up the usage message, both in usage() and in the main
program comment, both stylistically (sort and combine options)
and for accuracy (following the manual page, make note of the -s
and -S flags, and use the term 'send' instead of 'say' to reduce
confusion (SAY is the name of a command for output to the user,
not the connection.))

Obtained from: DragonFly

Rename logf --> chat_logf to avoid naming conflicts
with GCC built-in (and with C90 reserved library name).

Approved by: gordon (Mentor)

Big cleanup. Remove unused stuff, make closer to style(9).

OK'ed by: peter (long time ago)

Replace various spelling with FALLTHROUGH which is lint()able

Remove local prototypes for main().

remove __P

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>

Fix a buffer overflow due to sending strings >1k in length. This is unlikely
to be a security problem, but it's not totally impossible. OpenBSD take note

Reviewed by: imp

$Id$ -> $FreeBSD$

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

Merge ppp 2.3.3 -> 2.3.5 changes (for what it's worth)

Import chat from pppd 2.3.5 onto vendor branch.

merge ppp-2.3.3 changes onto mainline

Import ppp-2.3.3 chat onto vendor branch

-Wall cleanup.

Merge ppp-2.3.1 changes onto mainline

Import chat(8) from ppp-2.3.1 distribution

Obtained from: Paul Mackerras <paulus@cs.anu.edu.au>

Remove use of program_name variable.

make it so that chat doesn't fail when it can't get terminal params..
this allows it to work on non-tty input... also don't warn when this
happens as it could get noisy...

Silence is Acceptance

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Merge in changes from ppp-2.2's chat onto the mainline...

Vendor branch import of chat from ppp-2.2 package..

Remove trailing whitespace.

Use proper lock dir name

chat for ppp, from ppp 2.1.2