Git commits in Moodle 3.3.x by Matt Clarkson

commit ec85b1eb566232d27ae5ef6acff75d7b1ad8bad7
Author: Matt Clarkson <mattc@catalyst.net.nz>
Date:   Wed, 06 Dec 2017 05:41:01 +0800
Tag:    v3.3.4

MDL-60976 dml: Optimise replace_all_text()

commit d2d9e5a8648cbe1a661434c0c0e3877aaa43e3ab
Author: Matt Clarkson <mattc@catalyst.net.nz>
Date:   Wed, 13 Sep 2017 08:50:29 +0800
Tag:    v3.3.3

MDL-60105 search: Fix fatal error

commit 3ee0495c62e067f4a0989057750db09511fc79cc
Author: Matt Clarkson <mattc@catalyst.net.nz>
Date:   Wed, 13 Sep 2017 08:40:53 +0800
Tag:    v3.3.3

MDL-60105 mod_folder: Set timemodified on change