Author: Helen Foster
MDL-68753 lang: Import fixed English strings (en_fix)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=667d004a17f7e7ebc7b692226d27a34d26e789a3
http://github.com/moodle/moodle/commit/667d004a17f7e7ebc7b692226d27a34d26e789a3
+ 3.8 en [configextendedusernamechars,core_admin]