Configuration not using root hints, but forwarders configured later

[Grayhat]

> Problem is, after I use "unbound-control forward 192.0.2.53",
> followed by "unbound-control forward off", root hints are used back
> again. It does not seem to be possible to return back to original
> configuration. Not by simple reuse of unbound-control forward, at
> least. Or is there?

What if you configure unbound with an "empty" root-hints file ?