Add Battle for Wesnoth server.

[Supermagnum]

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The Battle for Wesnoth is an open source, turn-based strategy game with a high fantasy theme. It features both singleplayer and online/hotseat multiplayer combat.

Explore the world of Wesnoth and take part in its many adventures! Embark on a desperate quest to reclaim your rightful throne... Flee the Lich Lords to a new home across the sea... Delve into the darkest depths of the earth to craft a jewel of fire itself... Defend your kingdom against the ravaging hordes of a foul necromancer... Or lead a straggly band of survivors across the blazing sands to confront an unseen evil. https://www.wesnoth.org/

Server docker container: https://github.com/oalbiez/docker-wesnothd