* Samba project (by Andrew Tridgell, Jeremy Allison, and others).
*
* Copyright (c) The Exim Maintainers 2021
- * SPDX-License-Identifier: GPL-2.0-only
+ * SPDX-License-Identifier: GPL-2.0-or-later
* Tom Kistner provided additional code, adding spa_build_auth_challenge() to
* support server authentication mode.