usr.sbin: 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/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD 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

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified 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.

No functional change intended.

Fix the following -Wcast-qual warnings in usr.sbin/sa/db.c:

usr.sbin/sa/db.c:82:20: error: cast from 'char const (*)[9]' to 'void *' drops const qualifier [-Werror,-Wcast-qual]
key.data = (void*)&VERSION_KEY;
^
usr.sbin/sa/db.c:178:20: error: cast from 'char const (*)[9]' to 'void *' drops const qualifier [-Werror,-Wcast-qual]
key.data = (void*)&VERSION_KEY;
^

Replace the VERSION_KEY define with a writable char array, so no const
qualifier needs to be dropped anymore.

Submitted by: rdivacky

In usr.sbin/sa/db.c, avoid warnings about assigning two const char
arrays to non-const void pointers, by casting away const explicitly.

MFC after: 1 week

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.

Ensure that the -s flag truncates the accounting data.

This problem has only been reported on the amd64 platform.

PR: bin/120293
Tested by: Callum Gibson
MFC after: 2 weeks

Fix a compiler warning by using a printf format matching the variable
type.

Increase precision of time values in the process accounting
structure, while maintaining backward compatibility with legacy
file and record formats.