It’s licensed under CC0 to anyone wondering. BSD 0-Clause would probably be better but still fantastic.
CC0 is a horrible thing to use for software. It seems great, but it specifically does not give patent rights. Compare that to MIT which implicitly does so. CC0 specifically says it does not.
The US government doesn’t (to my knowledge at least) have copyright protections so MIT wouldn’t be possible. BSD 0-Clause is just better because e.g. Austria doesn’t allow you to cede copyright to the public domain and CC0 directly mentions the public domain in the terms of the license.
Interesting, SPDX does not list 0BSD as FSF approved, but FSF does approve it. This isn’t the first problem I’ve seen with SPDX’s list. They say CC0 is FSF approved but FSF only says it is approved for things besides code.
