I indent to discontinue and remove perl-Mail-GnuPG from Fedora.
It FTBFS on rawhide, because it seem to suffer from compatibility issues
with gnupg2 >= 2.1.5 .
AFAIS, nothing in Fedora uses it, so this step probably won't do much harm.
Should gnupg2 in Fedora < 23 be updated, perl-Mail-GnuPG will rendered
dysfunctional there. I could add "Requires: gnupg2 < 2.1.5" there but
this is something I'd rather not do.