The original intent of this library was to license it under
LGPLv2.1-or-later. However, due to a mismatch of copied header files
the files had a mismatch of confusingly different versions of LGPL/GPL
headers. This is all cleaned up now.

In addition, as I would like to drive adoption of the ipuz spec more
universally, I've decided to dual-license it under the MIT license.

Permission for this relicensing was explicitly sought and given by
Federico Mena, Tanmay Patil, and Pranjal Kole.