Author: Dan Poltawski
MDL-19549 lang: make a string less scary
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ec0a11285debaec15cf41a138db9d8560077292e
http://github.com/moodle/moodle/commit/ec0a11285debaec15cf41a138db9d8560077292e
+ 2.3 en [configintrotimezones,tool_timezoneimport]