Git commits in Moodle 3.1.3 by Juan Leyva

commit 001bd88aeeb5d830ec043d805ca418889c6e1c23
Author: Juan Leyva <juanleyvadelgado@gmail.com>
Date:   Fri, 04 Nov 2016 23:51:05 +0800
Tag:    v3.1.3

MDL-56765 webservice: After a new session is started unset old preferences


commit f5c6a29803006e3557182aa18f472902bd1c9940
Author: Juan Leyva <juanleyvadelgado@gmail.com>
Date:   Wed, 02 Nov 2016 05:35:30 +0800
Tag:    v3.1.3

MDL-56268 webservice: Format backtrace to avoid display private data


commit c3bb491c25597fff8efe8564510377c1a59592c0
Author: Juan Leyva <juanleyvadelgado@gmail.com>
Date:   Thu, 22 Sep 2016 17:52:11 +0800
Tag:    v3.1.3

MDL-56065 user: Fix update_users Web Service


commit 23460f7fdb686fb412cb745005ba344cc100bc6f
Author: Juan Leyva <juanleyvadelgado@gmail.com>
Date:   Mon, 20 Jun 2016 20:16:52 +0800
Tag:    v3.1.3

MDL-55222 webservice: Apply external_format_string in course names