Add java doc for MethodFilterInterceptor

core/src/main/java/com/opensymphony/xwork2/interceptor/ConversionErrorInterceptor.java

@@ -37,7 +37,13 @@ import java.util.Map;
  * display the original string ("abc") again rather than the int value (likely 0, which would make very little sense to
  * the user).
  * </p>
- *
+ * 
+ * <p>
+ * <b>Note:</b> Since 2.5.2, this interceptor extends {@link MethodFilterInterceptor}, therefore being
+ * able to deal with excludeMethods / includeMethods parameters. See [Workflow Interceptor]
+ * (class {@link DefaultWorkflowInterceptor}) for documentation and examples on how to use this feature.
+ * </p>
+ * 
  * <!-- END SNIPPET: description -->
  *
  * <p><u>Interceptor parameters:</u></p>