Add possibility to filter out common player names (gotvs, replay bots etc)

[GAMMACASE]

There's no actual 100% identification method to tell if the player is a bot/gotv or a an actual player, but it's still possible to deduce it from its playername in most cases (Although that also may lead to false positives which is a tradeoff in here). I wasn't really sure if I'd like having that built in, but I've got a few reports already, so I guess having some system to let server operators to filter player names they don't like to see would be nice to have.