Enforce standard transaction rules on testnet

Closes #1582

src/chainparams.cpp

@@ -219,7 +219,7 @@ public:
         fRequireRPCPassword = true;
         fMiningRequiresPeers = true;
         fDefaultConsistencyChecks = false;
-        fRequireStandard = false;
+        fRequireStandard = true;
         fMineBlocksOnDemand = false;
         fTestnetToBeDeprecatedFieldRPC = true;