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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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

kldload: Bring functionality in line with manual page

Honor -q parameter and do not display any warning messages when -q is
specified.

Approved by: dfr
MFC after: 2 weeks
Sponsored by: Resulta, s.r.o.
Differential Revision: https://reviews.freebsd.org/D35511

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 last case when kldload(8) wasn't printing the name of the module
that failed to load.

style(9) cleanup

- Delete trailing whitespace
- Fix alignment/variable sorting
- Delete single-line enclosing braces

MFC after: 1 week
Sponsored by: Dell EMC Isilon

Use nitems() from sys/param.h.

MFC after: 2 weeks.

Fix dmesg(1) -> dmesg(8)

Reported by: trasz

Fix typo

Reported by: dumbbell

Point the user to dmesg(1) to get informations about why loading a module did fail
instead of printing the cryptic "Exec format error"

MFC after: 1 week

Fix error counting

Import error message shown to the user when trying to load a module that is
already loaded or compiled withing the kernel

MFC after: 1 week

Add option to ignore error codes if the module specified is already loaded.

MFC after: 1 week

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Make flags in usage() and SYNOPSYS more style(9)-ish.

Suggested by: brian
MFC after: 3 days

o Add -q flag to usage().

MFC after: 1 week

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.

Perform some checking on the requested list of modules to warn people if they
try to load modules by filename out of the current directory where the module
in question may be further up the module path or not in the module path at all.

Also add some text to the man page to help explain what's going on.

Sponsored by: Redacted Consulting

style(9) pass prior to further changes.

Sponsored by: Redacted Consulting

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

Use __FBSDID() to quiet GCC 3.3 warnings.

Update documentation for kldload(8)'s ability to load multiple modules.

Submitted by: Daniel O'Connor <doconnor@gsoft.com.au>

Make it possible to kldload(8) many modules.

MFC after: 2 months
Sponsored by: Bright Path Solutions
Reviewed by: tjr

Include missing header files which define functions for which gcc has
builtins (e.g., exit, strcmp).

$Id$ -> $FreeBSD$

remoce unused #include.

Add -v in usage string. Add rcsid.

a few code style changes:
o start function names in column 1
o sort order of flags in getopt and switch
o don't try to reference progname
o unspam some changes introduced by a 2.2.1-R build box instead of a
-current build box

doc changes:
o document when these commands first appeared
o put email address in angle brakets
o minor mdoc clean up

activate the programs that will be used to manipulate kld modules

fix a few problems with missing headers, warn called with an exit
value, and undeclared getopt vars

these programs now compile -Wall clean (and yes, I know I should use
more than just -Wall) :)

Add utilities for the kernel linker.