Author: Dean Chimezie
MDL-86447 tool_mfa: Restore setup lang string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=81d2d088ef332902356920939c4b3d70f8fb2fd3
http://github.com/moodle/moodle/commit/81d2d088ef332902356920939c4b3d70f8fb2fd3
+ 5.0 en [setup,tool_mfa]