Remove $FreeBSD$: one-line sh pattern

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

Move all pam related config to lib/libpam/

Approved by: re (rgrimes), will (mentor), des
Differential Revision: https://reviews.freebsd.org/D17122

Simplify building libpam and fix libpam.a not containing the modules since r284345.

The change in r284345 moved the creation of openpam_static_modules.o to
lib/libpam/static_modules but never managed to get them into libpam.a.

Move this logic to lib/libpam/static_libpam and have it create a static
library for libpam.a The main lib/libpam/libpam will only create a
shared library. No redundancy in compilation or installation exists
in this solution.

This avoids requiring a pass with -D_NO_LIBPAM_SO_YET.

Sponsored by: EMC / Isilon Storage Division

Move build of openpam_static_modules.o to its own subdir
to avoid circular dependency b/w libpam and modules.

Reviewed by: obrien

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.

style.Makefile(5) police
(I've tried to keep to the spirit of the original formatting)

Reviewed by: des

Make it possible to use PAM in statically-linked applications.

Build structure for contribified Linux-PAM, plus some home-grown
modules for FreeBSD's standard authentication methods. Although
the Linux-PAM modules are present in the contrib tree, we don't
use any of them.

The main library "libpam" is composed of sources taken from three
places. First are the standard Linux-PAM libpam sources from the
contrib tree. Second are the Linux-PAM "libpam_misc" sources, also
from the contrib tree. In Linux these form a separate library.
But as Mike Smith pointed out to me, that seems pointless, so I
have combined them into the libpam library. Third are some additional
sources from the "src/lib/libpam" tree with some common functions
that make it easier to write modules. Those I wrote myself.

This work has been donated to FreeBSD by Juniper Networks, Inc.