Re: disable command queuing at startup?

I originally asked:

Once FreeBSD is up and running,
         "camcontrol negotiate $device -T disable"
will disable command queuing for $device.
Is there a setting or hint.* in some .conf file (loader.conf.local?)
that would do that during startup?
Thanks!
  -WBE
[I didn't spot an answer in camcontrol(8), ada(4), ahci(4), cam(3),
  cam(4), driver(9), device(9), devclass(9), device.hints(5), or
  sysctl(8), but maybe I missed it.]

to which Mike Scott <usenet.16@scottsonline.org.uk.invalid> kindly
replied:

rc.local perhaps?

That would at least ensure it happens.  It'd be even better if
there were some way for "Command Queueing enabled" during device
discovery to be suppressed for that device, especially if it could be
done based on manufacturer or model rather than $device.
 -WBE