Remove $FreeBSD$: two-line .h pattern

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

bootpd: Use C89 function definitions.

Trim a few duplicate (but incomplete) function prototypes as well.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D39520

bootptest: Fix a typo in a source code comment

- s/avaible/available/

MFC after: 3 days

libexec: 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.

Emply contemporary function prototypes in bootpd, rather than relying on
locally defined K&R prototypes in .c files; use appropriate casts for
pointer types now that types for arguments are available at compile time.
This ensures that compilers with multiple incompatible calling conventions
can select the correct calling convention for external functions.

Sponsored by: DARPA, AFRL
MFC after: 1 week

bootpd(8): De-register and minor cleanups.

For bootptest(8) also remuve an unused variable and replace
0 with a NULL for a pointer.

Re-format the license to conform to our BSD license template as much
as possible. This does not change the wording in any way.

Remove the 3rd clause ("advertising clause") of the BSD license as
permitted by the University of Berkeley on July 22, 1999. While the
clause itself mentions Lawrence Berkeley Laboratory, UCB is the sole
copyright holder of this file.

Reviewed by: imp, emaste, eadler
MFC after: 2 weeks

Spelling fixes for libexec/

In libexec/bootpd/tools/bootptest/print-bootp.c, use the correct printf
length modifier for the difference between two pointers.

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.

Avoid a few compiler warnings (printf codes, missing includes etc).

PR: bin/30864
Obtained from: Dan Lukes <dan@obluda.cz>
MFC after: 1 week

$Id$ -> $FreeBSD$

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.

Fix up programs which expect <net/if.h> to include <sys/time.h> to instead
do it themselves. (Some of these programs actually depended on this
beyond compiling the definition of struct ifinfo!) Also fix up some
other #include messes while we're at it.

add forgotten $Id$

Import bootpd-2.4.3 from ftp.mc.com

Rearrange bootpd