Feature(Bungee): Use server name as prefix for worlds

[granis]

Hey,

Great plugin! Very useful.
I made one addition, use/mod it if you are interested.

What is the problem?
For Bungeecord-servers, as noted in README, many worlds are mixed up due to same name.
However, the server-names in Bungeecord are unique.

What is the solution?
Prefix all world-names with the Bungeecord-server-name.

Example
Instead of "world", the name will be "server512_world". And it wont collide with "lobby_world" anymore.

Known bugs?
The first player joining will get "UNKNOWN_world" as mapname, but after a few seconds (at most) the bungeecord-server will reply with the server-name, and the worldname will be re-sent. So the name will be corrected. Possibly resulting in lots of new map entries in Xaero/client.

The server-name is saved after lookup, so only one player will have this problem ✨

[kosma]

Thanks for the PR. I really feel this functionality should be handled on Bungeecord/Velocity... it would save a lot of trouble of having to install the mod on all the different backend servers, and would also avoid hacks related to waiting for the settings packet. I don't want to accept the PR in this form - but I am considering adding Bungeecord/Velocity support to the mod, to do what you suggested (prepending server name to the world name).

I'm currently on vacation - I will look at this in more detail once I'm back. :)

[granis]

I agree it should be handled on the proxy, but I was under the impression that no such data (worldchange) is available on bungeecord?

Unless you use packet-rewriting, which I guess would be a very easy approach, but less update-safe.. :)