Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Add zdopen(3) to complement zopen(3).

zdopen() can be used in capability mode. Update zopen.3 accordingly
and fix some grammar nits while I'm here.

Reviewed by: delphij
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18456

Fix up FreeBSD tag for files not from a vendor branch

Unexpand the tag, remove the fbsd:nokeywords property and add the
svn:keywords property. This should eliminate the gratuituous diffs
that appear on these files in projects branches.

Sponsored by: The FreeBSD Foundation

Make it possible to seek within a gzip stream.

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.

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

Add huff __FBSDID()s puff to whew! libz

Add zopen(), a stdio wrapper for gzipped data streams.

Obtained from: NetBSD