Configuration store. Configuration consists of key-value-pairs.
| Column Name | Type | Properties | Docu |
| ckey | string | Primary-Key | the configuration key |
| cval | string | NULL-able | the configuration value |
| ckey | cval |
| "MagicSmokeVersion" | $this->version() |
| "ValidVouchers" | "1000 2000 2500 5000" |
| "OrderStop" | "24" |
| "ReserveStop" | "48" |
| "TicketIDChars" | "10" |
| "VoucherIDChars" | "10" |
| "Flag _admin" | "User is Admin" |
| "Flag _web" | "User is Customer" |
| "Flag _useWizard" | "User starts with the wizard mode" |