upstream dns is flakey

[majestrate]

reported on windows and linux

upstream dns becomes more unreliable when lokinet is in exit mode and more time passes.

[Chief36]

Also, sometimes DNSSEC validation fails even when the set upstream resolver is compatible.

[majestrate]

Also, sometimes DNSSEC validation fails even when the set upstream resolver is compatible.

yea, we need to provide tcp dns too as DNSSEC is too big for udp.