Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Fix -Wformat warnings by using proper format string qualifiers for
long and unsigned[ long] types

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.

Fixed error checking of pthread(3) functions.

PR: 143807
Submitted by: pluknet (partly)

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

Add some more comments and a -4 argument to restrict searches to only
A (not default A and AAAA) records. Now the longest time that a -4
thread might hang trying to resolve is only 2:30 instead of 5:00 ;)

Print the maximum resolution time encountered by each thread. Did you
know that the resolver might keep trying on a getaddrinfo() for up to
FIVE MINUTES?

Add my getaddrinfo(3) stress-tester as gaithrstress. The most obvious
regressions would be to see the program or your kernel crashing.

If you want to give it something to really test out, try a much more
reentrant version of the resolver.
<URL:http://green.homeunix.org/~green/reentrant_resolver.patch>
Any Mozilla-based browser would show you a clear difference.