Revert dust setting, keep Tx fee changes.

src/policy/policy.h

@@ -40,7 +40,7 @@ static const bool DEFAULT_PERMIT_BAREMULTISIG = true;
  * standard and should be done with care and ideally rarely. It makes sense to
  * only increase the dust limit after prior releases were already not creating
  * outputs below the new threshold */
-static const unsigned int DUST_RELAY_TX_FEE = 0.3 * COIN;
+static const unsigned int DUST_RELAY_TX_FEE = 3000;
 /**
  * Standard script verification flags that standard transactions will comply
  * with. However scripts violating these flags may still be present in valid