Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Fix various issues with the NFS and RPC related scripts:

1. Add new functionality to the force_depend method to incorporate the
tests for whether the service is enabled and/or already running.
2. Add a new option to bypass checking only that the service is enabled
at boot time, and always check if it is running.
3. Use this new functionality to greatly simplify the rc.d scripts that
use force_depend.
4. Add a force_depend for statd in lockd
5. Remove the check that either nfs_server or nfs_client is _enable'd
from statd and lockd. This was always overkill, and prevented using
the {one|force}start options, as well as stop'ing on the command line.
6. The yp* scripts had some of their arguments in various weird orders.
Bring them into line with the model.
7. If mountd fails to create /var/db/mountdtab, err out.

Ideas, suggestions, and/or review from delphij and jilles.
Pointy hats are completely my responsibility however.

Prepare for the removal of set_rcvar() by changing the rcvar=
assignments to the literal values it would have returned.

The concept of set_rcvar() was nice in theory, but the forks
it creates are a drag on the startup process, which is especially
noticeable on slower systems, such as embedded ones.

During the discussion on freebsd-rc@ a preference was expressed for
using ${name}_enable instead of the literal values. However the
code portability concept doesn't really apply since there are so
many other places where the literal name has to be searched for
and replaced. Also, using the literal value is also a tiny bit
faster than dereferencing the variables, and every little bit helps.

Substitute ypset for ypbind in REQUIRE lines. If you use ypset it has to
happen right after ypbind, and before anything that uses NIS. The only
change in rcorder accomplished by this patch is make that happen.

PR: conf/117555
Submitted by: John Marshall <john@rwsrv05.mby.riverwillow.net.au>

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 spurious # marks to be more consistent with existing style.

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

Discussed with: dougb, brooks
MFC after: 3 days

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