Doc: fix some details in ntfs specs
Doc: fix some details in ntfs specs

pbougue/navitia,xlqian/navitia,kinnou02/navitia,Tisseo/navitia,pbougue/navitia,pbougue/navitia,kinnou02/navitia,Tisseo/navitia,patochectp/navitia,Tisseo/navitia,xlqian/navitia,kinnou02/navitia,Tisseo/navitia,CanalTP/navitia,kinnou02/navitia,CanalTP/navitia,pbougue/navitia,xlqian/navitia,patochectp/navitia,xlqian/navitia,xlqian/navitia,Tisseo/navitia,CanalTP/navitia,CanalTP/navitia,patochectp/navitia,patochectp/navitia,CanalTP/navitia