_dbus_list_get_next_link so we don't get stuck in an infinite loop
  (start_busconfig_child): move processing of standard_session_servicedirs
  tags here because they have no content
  (bus_config_parser_content): check we don't have content in
  standard_session_servicedirs tag

* tools/Makefile.am: Make sure the /var/lib/dbus directory is created
  Packagers need to own this directory