Git commits in Moodle 2.7.5 by Vadim Dvorovenko

commit 9369b2167fa9c76c6a12e3c34fce75721c9947ae
Author: Vadim Dvorovenko <Vadimon@mail.ru>
Date:   Thu, 15 Jan 2015 01:49:52 +0800
Tag:    v2.7.5

MDL-42172 Authentification: Adding alternate names to "Lock user fields"

commit fa51ff99692abbcaf6b182bc56ecb44448bbe536
Author: Vadim Dvorovenko <Vadimon@mail.ru>
Date:   Thu, 15 Jan 2015 01:07:38 +0800
Tag:    v2.7.5

MDL-48798 Statistics: Adding lang string for user activity.

commit 82e95407eb200aee9e33af34cbc5ba706ad478b0
Author: Vadim Dvorovenko <Vadimon@mail.ru>
Date:   Thu, 15 Jan 2015 00:39:14 +0800
Tag:    v2.7.5

MDL-48779 MNet: multibyte substr in certificate generation