[dns-operations] PMTUD of .org servers

[Florian Weimer]

* Michael Graff:

> Right but I personally suspect that few recursive resolvers live on a
> network with less than Ethernet mtu.

By query count and number, it's a fair fraction, I assume.  Not by
eyeball count, of course.

> I do think many live behind fragment dropping firewalls. Spending
> time on pmtu for udp thus seems like a net loss to me.

Do you think it's okay if root or TLD operators require a 1500 path
MTU to resolvers?