Experimental addition of the EPL compatibility clause as OSI licenses compatibility.
Added the EPL compatibility clause in the form discussed on the mailing list,
adapted to apply to any FOSS license. Kept the same criterium, OSI approval, as
Proprietary Relicensing clause.
https://lists.fedorahosted.org/pipermail/copyleft-next/2012-August/000131.html

Signed-off-by: Engel Nyst <engel.nyst@gmail.com>