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

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

MFC r231667:

Fix various issues with the NFS and RPC related scripts.
Add new functionality to the force_depend method.

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

Eliminate global symbols starting with an underscore from rc.d
scripts, except for mdconfig* and jail. Such symbols are reserved
for the rc.subr internals. Most scripts can be fixed by just
declaring _foo symbols as local: few scripts actually need them to
be global.

Discussed with: dougb in freebsd-rc

Remove the requirement for the FreeBSD keyword as it no longer
makes any sense.

Discussed with: dougb, brooks
MFC after: 3 days

Be specific about which domainname is not set. It seems the man page
reference is not enough.

Cleanup as many instances of rc.conf variable use before
calling load_rc_config().

Approved by: markm (mentor) dougb

Fix style bugs:
* Space -> tabs conversion.
* Removed blanks before semicolon in "if ... ; then".
* Proper indentation of misindented lines.
* Put a full stop after some comments.
* Removed whitespace at end of line.

Approved by: silence from gordon

Clean up the scripts to use the new variables:
xntpd_* -> ntpd_*
portmap_* -> rpcbind_*

Also change single_mountd_enable -> mountd_enable
Changing the mountd flags brings us closer to NetBSD.

All of the old variable names are shimmed so you can continue to use the
old variable name.

Finally make /etc/rc.d/mountd no longer dependent on nfs as there are
(apparently) other consumers of mountd.

Submitted by: Mike Makonnen <makonnen@pacbell.net>

Merge in all the changes that Mike Makonnen has been maintaining for a
while. This is only the script pieces, the glue for the build comes next.

Submitted by: Mike Makonnen <makonnen@pacbell.net>
Reviewed by: silence on -current and -hackers
Prodded by: rwatson