Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1-only
Valid-License-Identifier: LGPL-2.1+
+Valid-License-Identifier: LGPL-2.1-or-later
SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
Usage-Guide:
To use this license in source code, put one of the following SPDX