* licenses: add opubl
* texlive: fix license for npp-for-context and lshort-german
This unbreaks evaluation for `texlive.combine { inherit (texlive) scheme-full;
pkgFilter = (_: true) }`. The problem doesn't manifest for the default pkgFilter
as `npp-for-context` is a doc-only-package (that by the way has recently been
removed from texlive).
ba6c229037