The steamcmd readme did not contain valheim/ in the relative path, which leads to a 404 page as /valheim_vanilla is empty, it should be /valheim/valheim_vanilla
Also fixes the category formatting in the valheim_plus's readme to separate the blocks of text.
(Also puts assetto corsa above avorion, which is alphabetical order)
* Changed Startup Command to a start.sh'less version
* Moved WINEARCH, WINEPREFIX and WINEDEBUG variables to panel
* Removed wine variables from install-script (where possible)