Killing Floor 2 item server

[Forceflow]

The multiplayer game Killing Floor 2 (content warning: zombies, blood) needs to contact an item server to figure out which cosmetic items players of the game have collected. This item server is hosted on analytics.tripwireinteractive.com.

This domain needs to be whitelisted, otherwise players will get a "Failed To Reach Item Server" message in-game, and they won't be able to use the items they have collected in the past.