https://bugzilla.redhat.com/show_bug.cgi?id=862160
--- Comment #14 from Mario Blättermann mario.blaettermann@gmail.com --- (In reply to comment #13)
I think, the license is GPLv2+.
The COPYING file says GPLv2, and the source file headers doesn't contain the "newer versions" clause. That's why it remains as GPLv2.