Author: Eric Merrill
MDL-53515 search: Extend search API to allow file indexing
http://git.moodle.org/gw?p=moodle.git;a=commit;h=091973dbd7f258511367a5787a6f36a78b1b3691
http://github.com/moodle/moodle/commit/091973dbd7f258511367a5787a6f36a78b1b3691
+ 3.1 en [matchingfile,core_search]
+ 3.1 en [matchingfiles,core_search]