[dns-wg] Turning off lameness checks for reverse

* Shane Kerr:

> Which servers are supposed to be seeing increased traffic? The parent
> servers should have exactly the same number of queries.

Some recursors will consult the parent again, before the TTL expires,
to check if the delegation has changed.  This seems to happen when a
referral returns only unreachable name servers.  (When using DNSSEC,
this is also the only way to recover from a spoofed referral.)

I'm torn about the current lameness notifications.  Even in the
current form, they helped us to catch a rather embarrassing error.
But I think the notifications should be based on current data, and the
they should contain more information (timestamps, types of probes and
responses).

-- 
Florian Weimer                <fweimer at bfk.de>
BFK edv-consulting GmbH       http://www.bfk.de/
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