Author: Mark Nelson
MDL-30937 report_backups: added ability to view backup logs
http://git.moodle.org/gw?p=moodle.git;a=commit;h=950d313a86a25c67ac4309e592ae93fc762592c8
http://github.com/moodle/moodle/commit/950d313a86a25c67ac4309e592ae93fc762592c8
+ 2.9 en [backupofcourselogs,report_backups]
+ 2.9 en [logsofbackupexecutedon,report_backups]
+ 2.9 en [nobackupsfound,report_backups]
+ 2.9 en [nologsfound,report_backups]
+ 2.9 en [strftimetime,report_backups]
+ 2.9 en [viewlogs,report_backups]