Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Parallelize the usr.sbin/ntp subdirectory build

Articulate all needed dependencies for the subdirectories

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.

ntpd 4.2.4p8 is now in the tree, ntptrace is dead RIP.

Security: CVE-2009-3563

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

Update the various files to sync with vendor import of 4.2.4p5.
sntp includes a copy of libopts in itself in vendor code, rewrite the
Makefile to compile and use only one copy. It is an internal library, not
installed.

MFC after: 2 weeks

If we don't want HTML docs, we might still want manpages.
If we don't want manpages, we might still want HTML docs.

Start the dreaded NOFOO -> NO_FOO conversion.

OK'ed by: core

Remove arlib (libares.a) from the build. It is not IPv6 compatible, not
really tested and probably not 64 bits-safe.

Discussed with: Harlann Stenn <www.ntp.org>

Update our ntpd to the long awaited 4.2.0 version.

This bring us several things:
- updated drivers
- IPv6 support at last
- ntp-genkeys is replaced by ntp-keygen
- ntptrace is now a script (courtesy of John Hay)
- lots of renamed files from .htm to .html (while I prefer .html, I
find the change a bit gratuitous)
- still no manpages :(

Please test and report.

Commit very much helped by: GNU arch (http://gnuarch.org/)

Follow the trend of moving MAINTAINER lines from Makefile into
src/MAINTAINERS.

These two patches makes it easier to compile custom versions of
NTP on FreeBSD:

The first one allows one to avoid installing the html files.

The second one allows one to override the CLOCKDEFS on the
make command line.

Submitted by: phk

Re-connect NTP docs to build.

Update for the import of 4.1.0.

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

Activate doc/ subdir

Please welcome the brand new ntp4 daemon & utilities in the FreeBSD tree.
This is the second part of the commit (the third -- link in usr.sbin/Makefile)
will be done after a more complete review by phk & obrien.

NOTE: the number of drivers included in the default configuration is very
minimal, mainly local clocks and the one I use RAWDCF. Anyone wanting to
have a more complete version will find recompilation very easy.

It builds and runs on both alpha & i386. It also does survive "make world".

Reviewed by: phk, obrien (partly)