Issue #83: QA remark: Document the 'user.register' route conditional …

…redirect.

src/Routing/RouteSubscriber.php

@@ -50,7 +50,8 @@ protected function alterRoutes(RouteCollection $collection): void {
 
     }
 
-    // Replace the core register route controller.
+    // Switch the Drupal user register form with a redirect to the EU Login
+    // registration if this option is enabled in the module configuration.
     $config = $this->configFactory->get('oe_authentication.settings');
     if ($config->get('redirect_user_register_route')) {
       $route = $collection->get('user.register');