Renamed the list hooks, because they were confusing.
Addressing Issue #73. When a friendly address cannot be found, filtering now
falls back to borrowing from the IPv4 pool any address and port. The IPv4 pool
also does a better job distributing traffic through its available addresses.
As an aside, the hash table code might now hold more than 64k lists, but I
haven't tested this much. And the hash code functions aren't overly aware of
it.
I broke the filtering and translate tests; working...