https://bugzilla.redhat.com/show_bug.cgi?id=1238374
--- Comment #6 from Sandro Mani manisandro@gmail.com --- Hmm, that's actually a tricky one: these files contain
/* As a special exception, you may create a larger work that contains part or all of the Bison parser skeleton and distribute that work under terms of your choice, so long as that work isn't itself a parser generator using the skeleton or a modified version thereof as a parser skeleton. [...] */
I'll ask legal if this means that this implies these files are relicensed to MIT.