Render more motor_vehicle=* tags

[kaneap]

Rendering roads which limit motor vehicle access can help a cyclist find routes which are relatively free of motor traffic. Specific tags that may be rendered are motor_vehicle=destination,agriculture,forestry,delivery,permit. Combinations of these may also be considered (the wiki documents motor_vehicle=agricultural;forestry).

Possible renderings may be a dashed version of the current motor_vehicle=no rendering.

[Phyks]

Done in 7c97017.