This is under e.g.
https://docs.fedoraproject.org/en-US/legal/allowed-licenses/
and is now used by the unicode-ident crate.
[licenses]
unlicensed = "deny"
copyleft = "allow"
-allow = ["Apache-2.0", "Apache-2.0 WITH LLVM-exception", "MIT", "BSD-3-Clause", "BSD-2-Clause", "Unlicense", "Unicode-DFS-2016"]
+allow = ["Apache-2.0", "Apache-2.0 WITH LLVM-exception", "MIT", "BSD-3-Clause", "BSD-2-Clause", "Unlicense", "Unicode-DFS-2016", "Unicode-3.0"]
private = { ignore = true }
[bans]