Hmm interesting.
So GPLv2 is compatible with GPLv2+, but due to GPLv2's incompatibility with GPLv3
(something which is not the case for GPLv2+) they need to be distinguishable (aka
'GPLv2' only or 'GPLv2+ and GPLv2'). Is my understanding correct? Could
someone confirm it, so I can proceed as well with the package review?