make placable cliffs for bridges between 2 cliffs for cossing rails without signals.

Since version 0.16.17 there is the problem with desync in multiplayer. lasts no more than 1 min to dsync I have rented a server at dawn-server.de on Ubuntu 16.04 Linux Server. There is always the latest version recorded in a timely manner. now I can not play there anymore Client is running on Window...