Git commits in Moodle 3.4.4 by cescobedo

commit e21e44b05406db1889fc00dc64204ac41b3e9e12
Author: cescobedo <carlos.escobedo@gmail.com>
Date:   Wed, 20 Jun 2018 17:49:11 +0800
Tag:    v3.4.4

MDL-61296 auth_ldap: remove PHP notices when field does not exist.

commit 4db0f1446ce3fc2a90946749121d73e673a3b9bd
Author: cescobedo <carlos.escobedo@gmail.com>
Date:   Wed, 06 Jun 2018 07:02:00 +0800
Tag:    v3.4.4

MDL-57968 core_message: Remove multiple unnecessary AJAX requests