Author: Petr Škoda
MDL-34635 support multilang in self enrol course welcome message
Includes also new help string for the custom multilang placeholders by Helen Foster.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=08962926221baa751a437bdbf0668010c1e19d55
http://github.com/moodle/moodle/commit/08962926221baa751a437bdbf0668010c1e19d55
+ 2.4 en [customwelcomemessage_help,enrol_self]