I may have erased things while rebasing, but I changed the license back
after commit `91ecf4e5`. It got lost in the abyss of git's garbage
collector, I guess.
Anyway: I changed this repo license from MIT to GPLv3. Long story short,
I just realised that I can't trust every entity that could come across
the code in my repo. In order to protect the free-ness of this repo, I
cannot only put a blind trust on the internet: it already proved to be a
bad idea (cf: the Minix code in Intel's CPU).