[imp] whitelist patch...

[Amith Varghese]

> > Could you be more specific about the registry implementation that you
> > mention? I'll move the blacklist/whitelist functionality if I get some
> > more details.
> 
> Uh, unless I *badly* misunderstood something, it's what you already did.

i think it was me that misunderstood stuff.  when your replied to Jan's email i
thought you were disagreeing with my implementation.  whoops :)

amith