Git commits in Moodle 3.4.1 by Zig Tan

commit 0e540897e6ac073fe1904fed5751043660edc70c
Author: Zig Tan <zig@moodle.com>
Date:   Tue, 02 Jan 2018 13:10:37 +0800
Tag:    v3.4.1

MDL-57786 mod_assign: Fix word count for online text submissions

commit e714f3cee988efe069a2333608451f0fd558e4a4
Author: Zig Tan <zig@moodle.com>
Date:   Fri, 22 Dec 2017 13:03:08 +0800
Tag:    v3.4.1

MDL-33886 backup: Add backup filename length < 255 char validation

commit f7bdcf959faa83000926b4116e9c455a8a2ffb26
Author: Zig Tan <zig@moodle.com>
Date:   Fri, 15 Dec 2017 09:19:26 +0800
Tag:    v3.4.1

MDL-54967 backup: Fix IMS CC import URL decoding for XML format

commit ece94bb4e2dc8027d2f2b439eb72c6fb941bf1e0
Author: Zig Tan <zig@moodle.com>
Date:   Tue, 12 Dec 2017 09:01:23 +0800
Tag:    v3.4.1

MDL-42676 mod_assign: Display message fix when using grade override