* But almost everything here is fixed published constants from RFCs, so also:
* Copyright (C) The Internet Society (2003)
* Copyright (C) The IETF Trust (2008)
- * SPDX-License-Identifier: GPL-2.0-only
+ * SPDX-License-Identifier: GPL-2.0-or-later
*
* Most of the text in RFC referencing comments is copy/paste from RFC,
* as is undoubtedly the intention.