Move top of the file "#pragma once" to after the following comment (swap them). If the comment is a BPL update it to the latest one

server/modules/authenticator/MySQLAuth/mysql_auth.h

@@ -1,9 +1,8 @@
-#pragma once
 /*
- * Copyright (c) 2016 MariaDB Corporation Ab
+ * Copyright (c) 2018 MariaDB Corporation Ab
  *
  * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file and at www.mariadb.com/bsl.
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
  *
  * Change Date: 2022-01-01
  *
@@ -11,6 +10,7 @@
  * of this software will be governed by version 2 or later of the General
  * Public License.
  */
+ #pragma once
 
 /*
  * @verbatim