fix description for SetupSignalHandler()

fix description for SetupSignalHandler() in alias.go to match actual behaviour of returning a context (instead of a channel)

Author: dzacball

alias.go

@@ -122,8 +122,8 @@ var (
 	// there is another OwnerReference with Controller flag set.
 	SetControllerReference = controllerutil.SetControllerReference
 
-	// SetupSignalHandler registered for SIGTERM and SIGINT. A stop channel is returned
-	// which is closed on one of these signals. If a second signal is caught, the program
+	// SetupSignalHandler registers for SIGTERM and SIGINT. A context is returned
+	// which is canceled on one of these signals. If a second signal is caught, the program
 	// is terminated with exit code 1.
 	SetupSignalHandler = signals.SetupSignalHandler