rustup: sweeping fixes for all the changes in 1.0-alpha

- Some switches to u64 instead of usize
- For now, allow(unstable)
- use associated types for all the Network stuff

src/status.rs

@@ -26,6 +26,7 @@ use std::cmp::Ordering::{self, Less, Equal, Greater};
 /// # use hyper::status::StatusCode::{Code123, Continue};
 /// assert_eq!(Code123.class().default_code(), Continue);
 /// ```
+#[derive(Show)]
 pub enum StatusCode {
     /// 100 Continue
     Continue = 100,
@@ -1595,12 +1596,6 @@ impl fmt::String for StatusCode {
     }
 }
 
-impl fmt::Show for StatusCode {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        self.to_string().fmt(fmt)
-    }
-}
-
 // Specified manually because the codegen for derived is slow (at the time of writing on the machine
 // of writing, 1.2 seconds) and verbose (though the optimiser cuts it down to size).
 impl PartialEq for StatusCode {