From Online Manual
- Maintenance Mode - Turns maintenance mode on and off for your forum, and it also makes your forum completely unusable.
- Language File - Changes the language of your forum.
- Cookie Name - Changes the name of the cookie that your forum creates for the user's browser.
- Queryless URLs - Turns the use of queries in the forum's urls on and off ("index.php/topic,1.0.html" vs. "index.php?topic=1.0").
- Output Compression - Turns output compression on and off.
- Database driven sessions - Sets whether sessions are managed by the database.