* Retry on lock being unavailable
* Refactor locking to return plain error
* Collect LockedTime in stats
* Add test case
* Add documentation for LOCK_TIMEOUT
* Log in case lock needs to be awaited
* Release resources created for awaiting lock
* Add option to run pre commands on arbitrary container
* Correctly handle quoted args in commands
* Provide defaults for test version arg
* Allow filtering of target containers
* Add documentation on exec commands
* Use mysqldump in exec test
* Add mysqldump section to recipes
* Also run commands test in swarm mode
* Use name instead of id
* Add syntax highlighting
* Add missing license headers
* Split code into multiple files
* Deduplicate logic for pruning backups against different storages
* Only parse templates when notifications are enabled
* Use better description
