Author: Ankit Agarwal
MDL-36615 calendar: The type of event should be named site not global for consistencies
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f5b20ea3177450cb9a3d4267c29a3a1e94d54c2c
http://github.com/moodle/moodle/commit/f5b20ea3177450cb9a3d4267c29a3a1e94d54c2c
+ 2.4 en [siteevents,core_calendar]