libc: Purge unneeded cdefs.h

These sys/cdefs.h are not needed. Purge them. They are mostly left-over
from the $FreeBSD$ removal. A few in libc are still required for macros
that cdefs.h defines. Keep those.

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D42385

Remove $FreeBSD$: one-line .c pattern

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

libc/yp: sort out warnings

.. in least-effort manner

Sponsored by: Rubicon Communications, LLC ("Netgate")

libc: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

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.

Handle failures to malloc memory to hold key or val copies.

PR: bin/83348

Remove duplicate "in".

Suggested by: Rob Farmer <rfarmer at predatorlabs.net>
MFC after: 3 days

Revert some of r177626. "in in" is valid in certain sentences.

PR: 121490
MFC after: 3 days

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 some "in in" typos in comments.

PR: 121490
Submitted by: Anatoly Borodin <anatoly.borodin@gmail.com>
Approved by: rwatson (mentor), jkoshy
MFC after: 3 days

Spell void * as void * rather than caddr_t. This is complicated by the
fact that caddr_t is often misspelled as char *.

Sponsored by: DARPA, NAI Labs

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.

ANSIfy and remove some dead code.

Sponsored by: DARPA, NAI Labs

Apply the following mechanical transformations in preparation for
ansification and constification:

s{\s+__P\((\(.*?\))\)}{$1}g;
s{\(\s+}{\(}g;
s{\s+\)}{\)}g;
s{\s+,}{,}g;
s{(\s+)(for|if|switch|while)\(}{$1$2 \(}g;
s{return ([^\(].*?);}{return ($1);}g;
s{([\w\)])([!=+/\*-]?=)([\w\(+-])}{$1 $2 $3}g;
s{\s+$}{\n};g

Also add $FreeBSD$ where needed.

MFC after: 1 week

Fix cc -Wall, fix rcsid warnings, add missing prototypes,
change prototypes to be the same as in the original sun tirpc code.
Remove ()P macro in a file where the mayority had ()P already removed.
Add them if the mayority use ()P macros.

Submitted by: mbr
Requested by: bde

$Id$ -> $FreeBSD$

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.

Code clean up:

Added missing headers for system functions.

Make sure xdr_ypresp_all_seq() always returns a sane 'status' value.
(There were cases where it was leaving the status uninitialized.)

Now that rpcgen is squared away, arrange to have all the NIS XDR routines
rpcgen-erated on the fly (just like librpcsvc).

Makefile: Add rule for generating yp_xdr.c and yp.h.

xdryp.c: gut everything except the special ypresp_all XDR function
needed to to handle yp_all() (this one can't be created on
the fly), and xdr_datum(), which isn't used internally by
libc, but which as documented as being there in yp_prot.h,
so what the hell. We now get everything else from yp_xdr.c.

yplib.c: change a few structure member names to match those found in
yp.h instead of those declared in yp_prot.h.

Fix xdr_ypmap_parms() so that it agrees with xdr_domainname(), xdr_peername()
and friends.

Add some missing xdr functions needed for server-side implementations.
(This is to help me reduce yppush a bit: it has its own copy of yp_xdr.c
right now, but I can get rid of it now that this stuff is here.)

Add back in the YP code from 1.1.5. (This attribution brought to you
by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which
disables YP entirely. User-land programs to come later.