Server optimisation update — Ymir Steam update #877836

This update brings major memory optimizations for servers, to fix the “out of memory” errors that started poping up on older servers with a lot of content. This update can reduce up to 60% the RAM used by the servers, and also comes with a small performance improvement. Besides that, this update also brings misc fixes for bugs and issues. Notably, issues related to modifying the terrain or platforms around water. Water will now update in realtime when digging, and digging tools are now unlocked around bronze age along with wooden platforms and towers. This update also adds a new “My games” tab in the ” Join game” menu: this tab lists all your currently played characters (on the same pc), and allows to conveniently load them directly, whether its a local game or a multiplayer game. For multiplayer games it also saves the last known address of the server so that you can connect even when t...