Author: Helen Foster
MDL-79323 lang: Import fixed English strings (en_fix)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=537d9202729c4f8e1a2097c7077d17ba66d54d75
http://github.com/moodle/moodle/commit/537d9202729c4f8e1a2097c7077d17ba66d54d75
+ 4.2 en [moodlenet:invalidshareformat,core_error]
+ 4.2 en [moodlenet:issuerisnotauthorized,core]