Fix Userdata Directory option in config.txt

[scottrice]

It is less important since most times we can figure out the location automatically, but right now confit.txt is a lie and thats a bad thing.

[mdeguzis]

The way we do it in our fork is using standard areas, such ad /usr/games , /usr /share/games etc. I know that can be a problem cross-platform but ik sure there are environment cars or something to help