- Fixed SMSG_GROUP_LIST opcode once again (I hope so).

- Fixed typos in SQL update.
- Added some nice comments.

src/game/Player.cpp

@@ -20743,4 +20743,4 @@ void Player::SendDuelCountdown(uint32 counter)
     WorldPacket data(SMSG_DUEL_COUNTDOWN, 4);
     data << uint32(counter);                                // seconds
     GetSession()->SendPacket(&data);
-}
+}