Git commits in Moodle 3.0.4 by Fred Woolard

commit 834b9a8e18fbeec16b0bd9cdd44174afc55a39a4
Author: Fred Woolard <woolardfa@appstate.edu>
Date:   Wed, 06 Apr 2016 04:29:32 +0800
Tag:    v3.0.4

MDL-53713 core: account for session_start returning false