When a string in the config is missing, the plugin doesn't cancel the current process and throws an error anymore, but rather gives a soft warning in the console and returns a backup string
If MySQL is enabled, the plugin will only make a database request at least x seconds after the last request, whereas you can define the value in the config under mysql.update-interval
Example: If a first player pings the server after startup, the value will be updated -> No update in the next x seconds even if a player pings -> After elapsed, as soon as the next player pings the server again
Especially helpful as well as recommended for servers with many players
Another improvement for MySQL support: After enabling maintenance on one proxy, the other connected ones will then also kick all non permitted players and switch their ServerListPlus state!
The "/maintenance" command helppage now only shows the commands the player actually has permission to execute