Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Set magic fbsd:nokeywords property that allows files to bypass
keyword expansion. (file-specific replacement for CVSROOT/exclude)

YAMF22

Update the -current sources from the 2.1 branch.

Approved (in spirit) by: jkh

This mega-commit brings in Jordan's latest sysinstall version..
This looks like it was developed offline, and is being spammed over the
top of the existing. "That's fine by me! I dont really care how you do
it, just get it in there..." said Jordan in a conversation a short while
ago...