Git commits in Moodle 3.5.0 by Matt Clarkson

commit 1c06098b6b1fdcd552ab7349206e6a0a0f5a930c
Author: Matt Clarkson <mattc@catalyst.net.nz>
Date:   Wed, 06 Dec 2017 05:41:01 +0800
Tag:    v3.5.0-beta

MDL-60976 dml: Optimise replace_all_text()