This change does some more stuff:
* change the filename to include the time with seconds to be able to run
the script easier more often
* Fix that _backup tables are only moved after 1h and not immidiately in
UTC+1
* Add a parameter to configure the number of minutes the backup
* Add parameter to change timestamps to be in localtime
* consider the timeout in num_transfer calculation
* remove rows in _backup tables to not print in them in the log
* rename tables to TABLES, because it is meant to be a constant