netopeer2-server: edited init script

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

net/netopeer2/files/netopeer2-server.init

@@ -13,3 +13,7 @@ start_service() {
     procd_close_instance
 }
 
+stop_service()
+{
+    service_stop ${PROG}
+}