Remove $FreeBSD$: one-line sh pattern

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

BSD.sendmail.dist: simplify mqueue group name setting

Submitted by: gshapiro

pkgbase: create sendmail directories only from BSD.sendmail.dist

Else when WITHOUT_SENDMAIL is set we still create a sendmail package
that contains (only) two directories.

Reviewed by: manu
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D24149

mtree: Add more runtime package tag

When using pkgbase those empty directories aren't packaged otherwise.

Reviewed by: bapt
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D20056

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.

Scheduled sweep using the README guidelines.

Approved by: re (rwatson)

In my continuing crusade to make life better for non-sendmail users, avoid
the creation of /var/spool/clientmqueue and therefore the need for the
smmsp user and group if NO_SENDMAIL is defined. This required breaking out
the creation of the directory into a new BSD.sendmail.dist mtree file.

MFC after: 1 week