* Player data to Database
Add player data into databases (SQLite3 & PG only)
PostgreSQL & SQLite: better POO Design for databases
Add --migrate-players argument to server + deprecation warning
* Remove players directory if empty
This reverts commits a2003b0d553c7223a61c75e5dad79ea68e058ba2 and 54ffe2e5de9ce44129f84f4748743f893b75fda7.
These weren't correct. Add a black magic warning instead.