[dns-operations] Delegation checking

[Randy Bush]

> in other words, are we looking at this wrong, saying that lameness is a
> parent's problem?  maybe if we say it's a child's problem, and do what we
> can to help zone operators run better child zones, our part can be bigger?

i am uninterested in the sisyphean task of fixing the root, if it 
actually needs fixing, which i hope not.  i feel responsible for those 
zones i have delegated to me and which i delegate.

randy