ratelimit: add a dump function

Signed-off-by: John Crispin <john@phrozen.org>

feeds/ucentral/ratelimit/files/usr/bin/ratelimit

@@ -353,6 +353,12 @@ function run_service() {
 			},
 			args: {
 			}
+		},
+		dump: {
+			call: function(req) {
+				return devices;
+			},
+			args: {}
 		}
 	});