fix Clone impl for Timeout

actix-utils/src/timeout.rs

@@ -12,7 +12,7 @@ use futures::{Async, Future, Poll};
 use tokio_timer::{clock, Delay};
 
 /// Applies a timeout to requests.
-#[derive(Debug, Clone)]
+#[derive(Debug)]
 pub struct Timeout<E = ()> {
     timeout: Duration,
     _t: PhantomData<E>,
@@ -65,6 +65,12 @@ impl<E> Timeout<E> {
     }
 }
 
+impl<E> Clone for Timeout<E> {
+    fn clone(&self) -> Self {
+        Timeout::new(self.timeout)
+    }
+}
+
 impl<S, E> NewTransform<S> for Timeout<E>
 where
     S: Service,