Fix Iteration (#117)
Fix Iteration (#117)

* Fix nextAuthority()

This was remarkibly broken. In iterative mode, we would never find
an authority deeper than example.com. For example, if the authority
for a.b.example.com was b.example.com, we failed, as we'd keep hitting
example.com

Sigh.

* Properly report caching on a specific code path

zmap/zdns,zmap/zdns,zmap/zdns