Git commits in Moodle 2.8.x by Vadim Dvorovenko

commit d3f49a8c84f84d4d43b3d3e5a53f5adc6d2a6e4a
Author: Vadim Dvorovenko <Vadimon@mail.ru>
Date:   Fri, 23 Jan 2015 10:49:46 +0800
Tag:    v2.8.4

MDL-48955 filter_mathjax: Regexp fix for texfiltercompatibility mode


commit a8808ad7bad21cb11617937e3feec8672cb15d61
Author: Vadim Dvorovenko <Vadimon@mail.ru>
Date:   Thu, 15 Jan 2015 01:49:52 +0800
Tag:    v2.8.3

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


commit 5e25d5630b2958214583ba17a924f4d3d4e74038
Author: Vadim Dvorovenko <Vadimon@mail.ru>
Date:   Thu, 15 Jan 2015 01:07:38 +0800
Tag:    v2.8.3

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


commit ad2c1a2156af43e9c870a885b837c5834ce476ae
Author: Vadim Dvorovenko <Vadimon@mail.ru>
Date:   Thu, 15 Jan 2015 00:39:14 +0800
Tag:    v2.8.3

MDL-48779 MNet: multibyte substr in certificate generation