Move logging up to the controllers so that our logging can operate at a more meta level

modules/user/controllers/logout.php

@@ -20,6 +20,8 @@
 class Logout_Controller extends Controller {
   public function index() {
     user::logout();
+    log::add("user", "User $user->name logged out",
+             log::INFO, html::anchor("user/$user->id", $user->name));
     if ($this->input->get("continue")) {
       url::redirect($this->input->get("continue"));
     }