Author: Marina Glancy
MDL-53363 tags: helper to search for tagged items; search course modules
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4218ad9371500b46c6181597a72cca16919e1e90
http://github.com/moodle/moodle/commit/4218ad9371500b46c6181597a72cca16919e1e90
+ 3.1 en [cachedef_tagindexbuilder,core_cache]