Author: Marina Glancy
MDL-65236 core: allow to alias languages in the lang selector
http://git.moodle.org/gw?p=moodle.git;a=commit;h=41653114b588c30780a0b04f65df5d496cdecfd2
http://github.com/moodle/moodle/commit/41653114b588c30780a0b04f65df5d496cdecfd2
+ 3.7 en [configlanglist,core_admin]