Git commits in Moodle 2.7.3 by Mark Nielsen

commit 3315c01e0f2ea35bad68f03dbc0478708df559f6
Author: Mark Nielsen <mark@moodlerooms.com>
Date:   Wed, 08 Oct 2014 02:48:35 +0800
Tag:    v2.7.3

MDL-47569 backup: Do not close questions tag if never opened


commit d9e9e799541160cf034ddd3293548502b5de0c03
Author: Mark Nielsen <mark@moodlerooms.com>
Date:   Wed, 08 Oct 2014 02:47:40 +0800
Tag:    v2.7.3

MDL-47569 backup: Escape section summary for XML