Revert "nl_types.h: explicitly include cdefs.h"

This isn't the right approach for addressing this cross-build issue.

This reverts commit 820401bf176996e41091d2e4190aded12a966b1d.

nl_types.h: explicitly include cdefs.h

This file uses __BEGIN_DECLS/__END_DECLS. When bootstrapping from
Linux/musl, they were missing.

Sponsored by: https://www.patreon.com/valpackett
Pull Request: https://github.com/freebsd/freebsd-src/pull/1066

include: 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 $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSD

The SPDX folks have obsoleted the BSD-2-Clause-NetBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

include: General 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.

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.

Remove NetBSD Foundation clauses 3 & 4. They eliminated those clauses
last year.

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

Analogous to __printflike and __scanflike, add the macro __format_arg which
expands to the GCC format_arg attribute if supported.

This fixes a syntax error in <nl_types.h> for compilers/tools not
implementing the GCC __attribute__ extensions.

Bring in NetBSD's improvements and cleanups to NLS subsystem, making
it type and endian clean and removing of stdio dependency from NLS
functions (catalog files now are processed via mmap()).

Also following changes were done (against NetBSD version):

. ANSI'fy prototypes
. Mention FreeBSD in comments
. Pull in sys/types.h instead of sys/_types.h since some types used here
are defined in sys/types.h

Obtained from: NetBSD (mostly)

Add forgotten <sys/_types.h> include. Fix some style bugs while I'm
here.

PR: 43326

Move definition of nl_item type to <sys/_types.h>, so that it can be
shared.

Breath deep and take __P out of the system include files.

# This appears to not break X11, but I'm having problems compiling the
# glide part of the server with or without this patch, so I can't tell
# for sure.

$Id$ -> $FreeBSD$

Protect declarations for C++ users.

Submitted by: Richard Wiwatowski <rjwiwat@ozemail.com.au>

Prototypes/typedefs cleanup
Add NL_CAT_LOCALE (will be implemented soon)

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.

Remove trailing whitespace.

Add a necessary include file for the catgets* routines.
Obtained from: NetBSD