Rework client.js to support running multiple instances at once and be
managed remotely and implement the neccessary communication
infrastructure for this.
Due to circular dependencies on the implementation of this the master
branch is significantly broken after this.
Merge the masterIP and masterPort configuration entries into a single
masterURL entry. Fixes the problem with connecting to an HTTPS version
of the master server and also makes it easier to host the master server
behind a reverse proxy.
This breaks all known code interfacing Clusterio.
Hornwitser