Author: Mark Nelson
MDL-40051 core_lib: replaced add_to_log call when failing to send email with an event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=362b9a0465cef4ac39d895995d2d22c290a3c28e
http://github.com/moodle/moodle/commit/362b9a0465cef4ac39d895995d2d22c290a3c28e
+ 2.7 en [eventemailfailed,core]