Author: Thom Rawson
MDL-63210 core: AJAX call redirects to login page when session expired
Backport of MDL-54551.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=24342e7617b30a6ec899a34a7e37be9fddc11632
http://github.com/moodle/moodle/commit/24342e7617b30a6ec899a34a7e37be9fddc11632
+ 3.4 en [servicerequireslogin,core_webservice]