License confusion

[hdholm]

Can you please clarify the license. The GitHub information repository information shows GPLv3 and that's what's in the COPYING file, but the meson build configuration and the Fedora Rawhide RPM both show GPLv3+ i.e., v3 or later, but I don't see the "or later" clause anywhere. As an aside, that made me notice that there's an RPM spec file in the Jose source, but not the Tang source. Was that intentional or an accidental ommision?