[mkgmap-dev] natural=sand / natural=beach / surface=sand

Proposal for adding natural=sand to the default mkgmap styles. The tag natural=sand is commonly used in the Netherlands for extensive areas of so called drift-sand (Dutch: zandverstuivingen, in osm on >300 ways/relations), which are unique in Europe. Can be rendered the same as natural=beach, which isn't rendered as well. Also surface=sand (used in polygons) can be considered to this group. Maybe the garmin type 0x53 (sand, tidal mud) is suited for this group, but I don't know how badly this will appear on Garmin/Mapsource (blue?). Since I'm using a TYP file it isn't my problem ;-)