usr.bin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

Remove $FreeBSD$: one-line sh pattern

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

pkgbase: Put accounting utilities in the acct package

Only set WARNS if not defined

This would allow interested parties to do experimental runs with an
environment set appropriately to raise all the warnings throughout the
build; e.g. env WARNS=6 NO_WERROR=yes buildworld.

Not currently touching the numerous instances in ^/tools.

MFC after: 1 week

Unbreak the build by re-enabling exceptions.

Disabling them breaks build on archs using GCC. The problem is at line 156 of
bits/basic_ios.h:

if (this->exceptions() & __state)
__throw_exception_again;

With exceptions disabled __throw_exception_again is defined as

#define __throw_exception_again

at line 45 of exception_defines.h and the code results in an empty loop body,
which fails because of -Werror.

Approved by: cognet

Turn off exceptions and rtti when building the c++ version of users.
Neither is used in the program and this saves us 10KB (around 40%) in binary
size.

Reimplements users(1) in C++.

This reduces the lines of code by roughly 50% (not counting the COPYRIGHT
header) and makes it more readable by using standard algorithms.

Approved by: bapt

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.

Perform all trivial ports to utmpx for usr.bin/.

They were already converted to use libulog, so it's easy to convert them
to utmpx.

Build usr.bin/ with WARNS=6 by default.

Also add some missing $FreeBSD$ to keep svn happy.

Add WARNS?=6, because it seems to build out of the box.

Port users(1) to libulog.

Instead of digging through the utmp database by hand, use proper API
calls to do so. Instead of parsing entries with a non-empty ut_user, we
now look at LOGIN_PROCESS entries.

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

WARNS=2 is going to become the default, so remove it from here.

Remove a bogus cast and lockdown users(1) with WARNS?=2

Submitted by: David Hill <david@phobia.ms>
Reviewed by: -audit
MFC after: 1 week

BSD 4.4 Lite Usr.bin Sources