Added support for multiple m2m fields with the same 'to' model and with related_name set to '+'. Backport of 4ee08958f154594b538207a53c1d457687b3f7ae from master
Added support for multiple m2m fields with the same 'to' model and with related_name set to '+'. Backport of 4ee08958f154594b538207a53c1d457687b3f7ae from master