The comment in the code says this code was copied from another source
with an appropriate link. However just local to this file it is not
clear what the license terms of that code are. I added the license
notice to this file that governs the particular code that was copied
over.
I would like to use this crate in an environment where we want to be
clear about licensing. Hopefully this is an okay change otherwise I
would be more than happy to do this a different way as long as the
license provenance is clear.
