Developer credits
Git commits in Moodle 3.0.0 by Pau Ferrer Ocaña
commit 60b69e4d2f590854ac3f720f1dbeed824f5b47e1 Author: Pau Ferrer Ocaña <crazyserver@gmail.com> Date: Wed, 23 Sep 2015 23:02:39 +0800 Tag: v3.0.0-beta MDL-50805 Messages: Add index to message_read to speed up message crons