A host and client side mod that removes fall damage cancelling. if you're the host everyone wont be able too, but if you're not it will just be turned off for you (It works better if all players have the mod but players can be stubborn, specifically if you have non ragdolled fall damage cancel off, it can make fall damage a bit less lenient than even vanilla for players without the mod).
Also thanks to Vegasx for help on the networking.