Add Custom Server Settings for Authenticated Users

[rdg922]

Currently there are no customization settings for creating servers, address this by adding custom server options for paid users.

Current ideas for Customization Settings:

• [ ] Player versus Player
• [ ] Item Randomizer
• [ ] Alternate Item Acquisition Types
• [ ] "Race" Styled gameplay
• [ ] Dungeon Generator based Roguelike Mode
• [ ] Ability to set commend line arguments

[yeslayla]

Requires implemented auth system