Git commits in Moodle 3.3.0 by Brendan Heywood

commit f2b7572a54ca0a61cb5e6b0e3d9440e5225ff6d1
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Wed, 01 Mar 2017 12:15:17 +0800
Tag:    v3.3.0-beta

MDL-58109 reports: Add security check for preventexecpath

commit 504d569b7139460adf3fe1949e8f5aa26383bf81
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Tue, 21 Feb 2017 09:44:59 +0800
Tag:    v3.3.0-beta

MDL-50719 cron: Fixed parallel task lock contention issues

commit c31a35b57d6bb7ec1f385f0bdee1b3bbfaa3d956
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Tue, 07 Feb 2017 10:21:01 +0800
Tag:    v3.3.0-beta

MDL-57887 setup: Support logging usernames in nginx access logs

commit cfd35ec846360b0570ee3eb63143c8a2b9c4db70
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Mon, 30 Jan 2017 12:51:50 +0800
Tag:    v3.3.0-beta

MDL-57810 lib: Disable nginx buffers when not required

commit 3e050643c7cbfe47ef128a8cba9bea888433fa3e
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Wed, 18 Jan 2017 12:33:31 +0800
Tag:    v3.3.0-beta

MDL-53978 usertours: Swap to better callback

commit 5ebd1fb9768969956c9131df4274f9cdff7f0134
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Thu, 06 Oct 2016 19:27:58 +0800
Tag:    v3.3.0-beta

MDL-53978 core: Added callbacks for all major render stages

commit d2df110950b7795b656fc1c2d74adf570070f3d0
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Tue, 13 Sep 2016 08:31:32 +0800
Tag:    v3.3.0-beta

MDL-55941 tablelib: Improve initialbar UX