Fix to auto-close on wrong password/id for new clients 0.2

Well, the code is kinda simple and since most people don't know about it yet, I'm releasing a diff for those who want it, it is just a piece of code copied from char.c and pasted into login.c to make the client send "rejected from the server" on wrong password, so it will not close anymore, and you can edit your msgstringtable.txt to show "wrong password/rejected from the server", hope you enjoy.