cache: m refactor

Author: ignoramous

src/plugins/cache-util.js

@@ -264,14 +264,12 @@ function retainOneAnswer(decodedDnsPacket) {
   // retain only the first answer, drop the rest
   if (
     !dnsutil.hasSingleQuestion(decodedDnsPacket) ||
+    !dnsutil.isQueryAQuadA(decodedDnsPacket) ||
     !dnsutil.hasAnswers(decodedDnsPacket)
   ) {
     return;
   }
 
-  const q = decodedDnsPacket.questions[0];
-  if (!dnsutil.isQueryAQuadA(q)) return;
-
   for (const a of decodedDnsPacket.answers) {
     if (dnsutil.isAnswerA(a) || dnsutil.isAnswerAAAA(a)) {
       decodedDnsPacket.answers = [a];