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)

Add the shutdown KEYWORD to those scripts that start persistent services
to allow them to do a "clean" shutdown.

I purposely avoided making changes to network-related stuff since the
system shutting down is pretty conclusive, and there may be complicated
dependencies on the network that I would rather not try to unravel.

I also skipped kerberos-related stuff for the reasons above, and
because I have no way to test it.

As previously discussed, add the svn:executable property to all scripts

Remove empty REQUIRE line

Use $required_modules wherever suitable. Use load_kld() in special
cases. So we get rid of quite a few lines of duplicated code.

o Remove unfinished code and make it possible to override
bsdextended_script from rc.conf(5):

Not objected by: trhodes

Add a ugidfw_load() function and fix up some of the scripting in this file.
This will allow better integration with the ports system.

Submitted by: clement

Remove requirement on FreeBSD keyword.

Skipped by: mtm (/me glares at mtm) :)

Give users the ability to load a mac_bsdextended(4) ruleset on boot (defaults
to NO of course). Provide a basic ruleset file, rc.bsdextended, but allow
the filename to be overridden through rc.conf.

Discussed with: rwatson (awhile ago)