Set interface "directions" based on names

src/ratecontroller.rs

@@ -13,7 +13,7 @@ use std::sync::{Arc, Mutex, RwLock};
 use std::thread::sleep;
 use std::time::Duration;
 
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 pub enum StatsDirection {
     RX,
     TX,