Leaflet/Leaflet — pull request #1494 by bozdoz (2013-03-05 19:57:32+00:00)
Title: Optional addOverlay "toggle"

Optional argument for adding a toggled overlay to a layers control.

The method `.addOverlay(layer, "Name", true)` would add the layer with text "Name" to the layers control box, and also toggle the checkbox and display the layer on the map.