[Tagging] Mapping larger Mini-roundabouts

[Georg Feddern]

> For highway=pedestrian, at platforms and many other things we allow to 
> add area=yes to a feature to turn a circular way (ring) to a circular 
> area (filled area, polygon).
> If - and that's in fact more or less the result of the discussions we 
> had in the last days - the difference between mini roundabouts and 
> roundabouts is the traversability of the center part, I would say, 
> mapping a mini roundabout as a way would in theory be sufficient 
> without area=yes, because area=yes would be implied.
> On the other hand I would propose to add area=yes to avoid confusion 
> both at data consumer side as well as on mapper side (yes, they MEANT 
> it to be a mini roundabout, I guess, because they knew it's an area 
> without obstacle in the middle).

+1