Currently, it seems that only the leaflet_tile_layer and leaflet_tile_layer_attribution are configurable.
For private mapping sources is may be necessary to configure other leaflet settings depending on your datasource, for example:
- tile size (defaults to 256, but Google, for example, now uses 1024)
- min zoom
- max zoom
- projection (whether you assume the earth is round, or slightly squidgy - e.g. geoid)
Ideally, anything config exposed by Leaflet, we should be able to configure too.