since the option is boolean, it would be better to compare based on bool vs false, not as integers.
(to be compliant with name-lookup-07). commented from yoshfuji
using ICMPv6 node information query. experimental.
XXX linklocal responses XXX PTR
XXX implement code to attach EDNS0 for my buffer size (= reconstruct query).
correct receive buffer length consideration on relay() case. if query length > 512, use TCP to contact to the relay. XXX should support EDNS0 on outbound too. to do this we need a query retry logic on FormErr.