This is being added straight to 4.2, prior to the `make license` command which will use this to generate a more complete license file. Licenses information and ambiguities worked with Dalai Felinto. Part of !129018.
Differential Revision: https://developer.blender.org/D15233
I also changed New BSD to BSD 3 Clause. Differential Revision: https://developer.blender.org/D9791