Only use dnsseeds and static seeds when not on testnet.

src/net.cpp

@@ -1146,6 +1146,8 @@ void DNSAddressSeed()
 {
     int found = 0;
 
+    if (!fTestNet)
+    {
         printf("Loading addresses from DNS seeds (could take a while)\n");
 
         for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
@@ -1163,6 +1165,7 @@ void DNSAddressSeed()
                 }
             }
         }
+    }
 
     printf("%d addresses found from DNS seeds\n", found);
 }