Small CTE Update — GROUND BRANCH Steam update #436258

One last update before we push CTE to the main branch. Fixes: * disabled non-rendered footstep logic (double footsteps) * updated Lua game mode logic to read Difficulty from command line Server Player Limits changed: Listen Server (Self hosting) max players is 8 Dedicated Server max players 16 In the future we will separate off dedicated servers set for more than 8 as custom and present them to the player separate from official and "stock" servers. Some game/game mode features may not be available to custom servers though, as there are some things coming in the future that make having 16 players in PvE difficult.