add addTo function to Handler (#5930)

src/core/Handler.js

@@ -47,3 +47,11 @@ export var Handler = Class.extend({
 	// @method removeHooks()
 	// Called when the handler is disabled, should remove the event hooks added previously.
 });
+
+// @section There is static function which can be called without instantiating L.Handler:
+// @function addTo(map: Map, name: String): this
+// Adds a new Handler to the given map with the given name.
+Handler.addTo = function (map, name) {
+	map.addHandler(name, this);
+	return this;
+};

src/map/Map.js

@@ -682,7 +682,6 @@ export var Map = Evented.extend({
 		this.fire('locationfound', data);
 	},
 
-	// TODO handler.addTo
 	// TODO Appropriate docs section?
 	// @section Other Methods
 	// @method addHandler(name: String, HandlerClass: Function): this