Git commits in Moodle 3.3.4 by Matteo Scaramuccia

commit 70a713c3d8e14311f9cc5e900771fbd48830ca24
Author: Matteo Scaramuccia <moodle@matteoscaramuccia.com>
Date:   Tue, 14 Nov 2017 07:24:29 +0800
Tag:    v3.3.4

MDL-60793 mod_chat: Renamed 'system' into 'issystem'


commit 4e00702953d5df0acad304b1d65e0093986f4421
Author: Matteo Scaramuccia <moodle@matteoscaramuccia.com>
Date:   Tue, 14 Nov 2017 06:26:08 +0800
Tag:    v3.3.4

MDL-60793 core_ddl: Added the new MySQL 8 reserved words


commit feb69eb8a568952fd73a55997555036494d844da
Author: Matteo Scaramuccia <moodle@matteoscaramuccia.com>
Date:   Tue, 05 Sep 2017 05:12:47 +0800
Tag:    v3.3.4

MDL-59099 dml: MySQL8 supports only the Barracuda file format.