WMS GetFeatureInfo beyond scale?

[doug@…]

I don't know if I would call this a bug, but the current behaviour of
MapServer's WMS GetFeatureInfo is to allow a request to be made even when the
layer is not shown on the map (outside of its scale range). I think that the
scale dependencies of a layer should be respected for both the GetMap and
GetFeatureInfo requests, and a request made using BBOX where the layer wouldn't
be visible should return an exception.