[WouterGritter]

Closes #1011.

Adds:

# The servers the "/hub" command sends players to, in order of preference.
# The same dynamic fallback principles apply here: "dynamic-fallbacks-filter" decides
# which of these servers is picked, and players already on the picked server are told
# they are already connected.
# Leave this empty (the default) to have "/hub" use the regular fallback chain instead,
# meaning the forced host matching the player's virtual host, or "try" if there is none.
hub-servers = []