bug 1451750 - treat rrsets from different resolvers as different r=mcmanus

... even if all the addresses are identical.

Otherwise the IsTRR() bit would be dropped, resulting in
about:networking showing false for this entry while in reality being
TRR. Or vice versa.

MozReview-Commit-ID: JABLm09iCnn

--HG--
extra : rebase_source : 24f9ff8b6818c00359069add23d1354ab2f1b1f9

netwerk/dns/nsHostResolver.cpp

@@ -1437,6 +1437,10 @@ different_rrset(AddrInfo *rrset1, AddrInfo *rrset2)
     nsTArray<NetAddr> orderedSet1;
     nsTArray<NetAddr> orderedSet2;
 
+    if (rrset1->IsTRR() != rrset2->IsTRR()) {
+        return true;
+    }
+
     for (NetAddrElement *element = rrset1->mAddresses.getFirst();
          element; element = element->getNext()) {
         if (LOG_ENABLED()) {