Git commits in Moodle 3.4.5 by Jean-Michel Vedrine

commit 5eb7a89f6fa3a1a00c64827112cff228da5d00e4
Author: Jean-Michel Vedrine <vedrine@vedrine.org>
Date:   Thu, 21 Jun 2018 22:17:33 +0800
Tag:    v3.4.5

MDL-62761 lesson: wrong deadlines on index with overrides