Feature Request: Add bridge property on water_polygons

[westnordost]

Some aqueducts are mapped as water polygons when they are broad enough, just like this one:

https://www.openstreetmap.org/way/199901926#map=19/43.57398/1.46914

For this to render correctly, it would be necessary to add optionally at least the bridge property to water_polygons. For consistency, maybe also add tunnel.