fixup: use format=overlay for overlays with a stripped down root template
fixup: use format=overlay for overlays with a stripped down root template

DanielNeugebauer/adhocracy,phihag/adhocracy,phihag/adhocracy,alkadis/vcv,liqd/adhocracy,DanielNeugebauer/adhocracy,phihag/adhocracy,DanielNeugebauer/adhocracy,DanielNeugebauer/adhocracy,alkadis/vcv,liqd/adhocracy,DanielNeugebauer/adhocracy,liqd/adhocracy,liqd/adhocracy,alkadis/vcv,alkadis/vcv,phihag/adhocracy,alkadis/vcv,phihag/adhocracy