Reviewed the semantic of the handler context.

Adapted existing code to fit the new router design.

library/server/wsf/router/wsf_handler.e

@@ -24,7 +24,7 @@ feature {WSF_ROUTER} -- Mapping
 			Result /= Void and then Result.handler = Current
 		end
 
-	on_mapped (a_mapping: WSF_ROUTER_MAPPING; a_rqst_methods: detachable WSF_ROUTER_METHODS)
+	on_mapped (a_mapping: like new_mapping; a_rqst_methods: detachable WSF_ROUTER_METHODS)
 			-- Callback called when a router map a route to Current handler
 		do
 		end