Both Linux and Windows server files are now available! If you downloaded the Windows server files earlier, then you need to download the hotfix. It contains some updated lua files as well as the linux server file:
The following 2.1 server packages include the hotfix and will work for both Linux and Windows:
Also, if you missed the release of the client installers, check out its news post by clicking here. Alternatively, click here to download the full 2.1 installer or click here to download the 2.1 patch.