Remove $FreeBSD$: one-line sh pattern

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

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.

Anything that casts struct sockaddr * to struct sockaddr_foo is safe
due to careful design. We've not yet figured out how to properly
annotate the sockaddr structs to communicate this to the compiler and
there's a number of constructs in the tree that make this annotation
challenging.

As such, reduce warns to 3 here because this code really isn't warns 6
safe, even if it kinda sorta appears to be on intel (which has no such
alignment restrictions). Warns 4 adds the -Wcast-align warning.

# fixes the mips tinderbox build

The last big commit: let usr.sbin/ use WARNS=6 by default.

- Fix the bug in write(2) called with incorrect parameters resulting in writes
always started from the start of the packet.
- Fix usage string (multiple addresses can be specified).
- Make the source more style(9) compliant.
- Improve error reporting (do not silently fail if something goes
wrong).
- Make functions static.
- Use warns level 6.

Approved by: re (kib)
Discussed with: Marc Balmer <marc@msys.ch>, brian, mbr

Compiles without higher warn level

M wake/Makefile

Approved by: re (previous commit)

Add wake, a tool to send Wake on LAN frames to hosts on a local Ethernet network

Submitted by: Marc Balmer <marc@msys.ch>
Reviewed by: rwatson
Approved by: re

M usr.sbin/Makefile
A usr.sbin/wake
AM usr.sbin/wake/wake.c
AM usr.sbin/wake/Makefile
AM usr.sbin/wake/wake.8