MDL-42890 backups: Updated help string to indicate logging is required
Merge branch 'MDL-44608-master-fix1' of http://github.com/damyon/moodle
Merge branch 'MDL-43341' of git://github.com/nobelium/moodle
MDL-42025 behat: changed behat tag _only_local to _file_upload
Merge branch 'wip-mdl-44552' of https://github.com/rajeshtaneja/moodle
MDL-44582 installer: added check for php json extension
Merge branch 'MDL-42892-master_42890' of git://github.com/ankitagarwal/moodle