Author: Michael Aherne
MDL-43669 messaging Enable sending email only from no-reply address
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8257e19b7ab35d79e1ca29c68b2cd3787a8621d3
http://github.com/moodle/moodle/commit/8257e19b7ab35d79e1ca29c68b2cd3787a8621d3
+ 2.6 en [configemailonlyfromnoreplyaddress,message_email]
+ 2.6 en [emailonlyfromnoreplyaddress,message_email]