Remove $FreeBSD$: one-line sh pattern

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

Convert usr.sbin to LIBADD
Reduce overlinking

Use src.opts.mk in preference to bsd.own.mk except where we need stuff
from the latter.

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.

Obey MK_INET6_SUPPORT.

Remove kludges intended to support src trees with partial obj trees.

Discussed with: ru

There is no need for this makefile to reference BDECFLAGS, particularly
since that is no longer defined in the default system install.

MFC after: 1 week

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.

Remove GCC'isms in CFLAGS.

IPv6 support for lpr.

Reviewed by: freebsd-current (no objection)
Obtained from: KAME

$Id$ -> $FreeBSD$

Fix additional warnings. Remove -Werror, since some people have complained
about it.

PR: 7886
Submitted by: Stefan Eggers <seggers@semyam.dinoco.de> (partially)

Use `foo/bar.a' instead of `-Lfoo -lbar' for linking to static internal
libraries so that `ld -f' in can create correct dependencies for
yet-to-be-built libraries.

Get the default BINDIR correctly (by including ../Makefile.inc recursively.
Override the default it it is wrong.

Don't override defaults when the defaults are correct.

Add -Wno-unused so that ``make world'' can complete successfully.
GCC suppresses the warning for ``standard'' header files, but since the
headers do not come from the ``standard'' place in a ``make world'', GCC
doesn't get it.

Mega lpd/lpd upgrade, part I:

- Get rid of a lot of the static variables which were shared by
many routines and programs in the suite.
- Create an abstract interface to the printcap database, so that
other retrieval and iteration mechanisms could be developed
(e.g., YP, Hesiod, or automatic retrieval from a trusted server).
- Give each capability a human-readable name in addition to the historic
two-character one.
- Otherwise generally clean up a lot of dark corners. Many still remain.
- When submitting jobs, use the official login name record (from getlogin())
if there is one, rather than reverse-mapping the uid.

More to come...