Author: Andrew Nicols
MDL-62370 core_privacy: Directory-less subsystems are compliant
http://git.moodle.org/gw?p=moodle.git;a=commit;h=93476477d63ae0ce6146cc763b4eee2804cbf739
http://github.com/moodle/moodle/commit/93476477d63ae0ce6146cc763b4eee2804cbf739
+ 3.4 en [privacy:subsystem:empty,privacy]