LGPL-2.1

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
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    SPDX-License-Identifier: LGPL-2.1
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License-Text:

GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999

Copyright (C) 1991, 1999 Free Software Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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signature of Ty Coon, 1 April 1990
Ty Coon, President of Vice
That's all there is to it!