fix invalid unwrap()

unwrap on a routine always returns None, so the unwrap() has no meaning
(probably originally introduced just as a way to get match arms to
have the same return result without thinking too much about it).

services/net/src/main.rs

@@ -926,7 +926,7 @@ fn main() -> ! {
                                     .unwrap_or_default(),
                             )
                         }
-                        None => respond_with_error(msg, NetError::Invalid).unwrap(),
+                        None => respond_with_error(msg, NetError::Invalid).unwrap_or(()), // this always returns None, can't do anything other than this.
                     }
                 } else {
                     respond_with_error(msg, NetError::Invalid);