Ticket #57134: 57134-suggestion.patch

src/wp-includes/load.php

@@ -270 +270 @@
         }
 
         if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) {
+                status_header( 503 );
+                nocache_headers();
+                header( 'Retry-After: 600' );
+
                 require_once WP_CONTENT_DIR . '/maintenance.php';
                 die();
         }