Notification of string changes

Author: jerome mouneyrac
registration MDL-25261 trivial confirmation regitration page improvement


http://git.moodle.org/gw?p=moodle.git;a=commit;h=5bf725440cdc18951ec6af36fccab53029e82749
http://github.com/moodle/moodle/commit/5bf725440cdc18951ec6af36fccab53029e82749

+ 2.0 en [registrationconfirmedon,core_hub]