Passwords should not be logged in plaintext.

[nswalters]

Currently, in login_prompt_handler.go there is a call to mudlog.Debug which ends up logging a user's password in plaintext. Perhaps this should respect the MaskInput and MaskTemplate values?

[Volte6]

Agreed. I didn't realize it was doing this. This needs to be fixed.

[Volte6]

Fixed in #446