Fix IPv4 DNS resolution when IPv6 is enabled

tasmota/tasmota_support/support_wifi.ino

@@ -893,6 +893,9 @@ bool WifiHostByName(const char* aHostname, IPAddress& aResult) {
   }
 #else
   // DnsClient can't do one-shot mDNS queries so use WiFi.hostByName() for *.local
+#ifdef USE_IPV6
+  aResult.setV4();    // force IPv4 result for now, until DNS is updated to IPv6
+#endif
   size_t hostname_len = strlen(aHostname);
   if (strstr_P(aHostname, PSTR(".local")) == &aHostname[hostname_len] - 6) {
     if (WiFi.hostByName(aHostname, aResult)) {