Add check for MAX_PLAYERS and console variable maxplayers

[WoutProvost]

These should match. The check should throw an error if they differ.

One of these natives can be used:

GetConsoleVarAsInt("maxplayers");
GetMaxPlayers();

[Mergevos]

@WoutProvost wasn't this fixed in 8fb5ad1 and in cd08341?

[Y-Less]

Yes it was, thanks.