Git merges in Moodle 3.6.4 by David Monllaó

commit 8cd7ebf2396bf553bbcda2073ee7bd1de5ec7bba
Author: David Monllaó <davidm@moodle.com>
Date:   Fri, 26 Apr 2019 00:41:46 +0800
Tag:    v3.6.4

Merge branch 'MDL-64673-36' of git://github.com/aanabit/moodle into MOODLE_36_STABLE


commit 937b5c4c696bffed2bbadee73a7aa62653837fbb
Author: David Monllaó <davidm@moodle.com>
Date:   Thu, 25 Apr 2019 02:07:06 +0800
Tag:    v3.6.4

Merge branch 'MDL-64672-36' of git://github.com/aanabit/moodle into MOODLE_36_STABLE


commit 5413077874987e2d7f063479dc55d62ffb6dd714
Author: David Monllaó <davidm@moodle.com>
Date:   Thu, 25 Apr 2019 00:13:56 +0800
Tag:    v3.6.4

Merge branch 'MDL-64985-36' of git://github.com/sarjona/moodle into MOODLE_36_STABLE


commit 6ffae61d7051a861dc5e7ea6e156a4cddc8c94fe
Author: David Monllaó <davidm@moodle.com>
Date:   Thu, 25 Apr 2019 00:07:50 +0800
Tag:    v3.6.4

Merge branch 'MDL-64666-36' of git://github.com/aanabit/moodle into MOODLE_36_STABLE


commit eaba78a8b2f3387368a5d3ef97abec5d9638ff5e
Author: David Monllaó <davidm@moodle.com>
Date:   Mon, 22 Apr 2019 19:25:03 +0800
Tag:    v3.6.4

Merge branch 'MDL-64102-36' of git://github.com/bmbrands/moodle into MOODLE_36_STABLE


commit e9a8d6e781c9cfb9a584af4262a54f74b0210d7d
Author: David Monllaó <davidm@moodle.com>
Date:   Mon, 22 Apr 2019 19:16:39 +0800
Tag:    v3.6.4

Merge branch 'MDL-65102-36' of git://github.com/rezaies/moodle into MOODLE_36_STABLE