Author: David Mudrak
Improved the information display about a non-standard backup file
http://git.moodle.org/gw?p=moodle.git;a=commit;h=71d1751c53fdbbe9c7d4bdb747986b929865b36a
http://github.com/moodle/moodle/commit/71d1751c53fdbbe9c7d4bdb747986b929865b36a
+ 2.1 en [backupdetailsnonstandardinfo,core_backup]