WIP: dns64: workaround for broken auths which fail on AAAA query

Some auths return weird stuff or timeout on AAAA query.

Fixes: #483

modules/dns64/dns64.lua

@@ -40,7 +40,6 @@ function M.layer.consume(state, req, pkt)
 	end
 
 	local qry = req:current()
-	print(state, pkt:rcode(), tonumber(req.answ_selected.len), pkt:qname(), pkt:qtype(), qry.flags.RESOLVED)
 	if bit.band(state, kres.FAIL) ~= 0 and not qry.flags.RESOLVED then
 		-- resolution is not finished yet
 		return state
@@ -51,7 +50,6 @@ function M.layer.consume(state, req, pkt)
 	if bit.band(state, kres.DONE) and rcode == kres.rcode.NOERROR and req.answ_selected.len > 0 then
 		-- NOERROR might be NODATA, look for AAAA in answer
 		for idx = 0, tonumber(req.answ_selected.len - 1) do
-			print(idx)
 			if (req.answ_selected.at[idx].to_wire == true
 				and req.answ_selected.at[idx].rr.type == kres.type.AAAA)
 			then
@@ -60,10 +58,12 @@ function M.layer.consume(state, req, pkt)
 			end
 		end
 	end
-	print('aaaapresent ' .. tostring(aaaapresent))
 	if pkt:qtype() == kres.type.AAAA and pkt:qname() == qry:name()
 			and not qry.flags.CNAME and qry.parent == nil
 			and aaaapresent == false then
+		if verbose() then
+			ffi.C.kr_log_qverbose_impl(qry, 'dns64', 'no AAAA found, querying for A\n')
+		end
 		-- Start a *marked* corresponding A sub-query.
 		local extraFlags = kres.mk_qflags({})
 		extraFlags.DNSSEC_WANT = qry.flags.DNSSEC_WANT