Allow player-owned game servers

[verdie-g]

In the current design of cRPG Bannerlord, since a game server sends xp/gold to the central server it should be trusted so players won't be allowed to own their server. Not sure how it was done in Warband but I believe the server owner could cheat easily after digging the network calls.

One thing that we could do so clans have their own server is to have a read-only API scope so that these servers can get player stats and items but cannot send xp and gold.