Add sqlmagic command as allowed in the limited shell.
Watch crons running > 2 min and kill crons running > 3 min.
SQL: Tune also key_buffer_size by default.
SQL: Improve sqlmagic converter and allow it to use control files.
SQL: The accesslog table should always use InnoDB, in case stats are enabled.
SQL: Make default_storage_engine configurable with _DB_ENGINE option.