Remove $FreeBSD$: one-line sh pattern

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

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.

/etc/mail/sendmail.cw is /etc/mail/local-host-names, now.

PR: misc/22262
Submitted by: Michael Bryan <fbsd-security@ursine.com>

Correct $FreeBSD tags to include the (missing) ``:'', restoring the tags
to a useful condition.

Add sample databases for sendmail (access, mailertable, virtusertable),
as well as rename access.txt back to the standard access. Also modify
the Makefile to know how to build hashes for each of these databases.
If one of the databases is missing when Make is run, use a commented
out version of the sample.

Reviewed by: peter
Approved by: jkh