Currently read_password does not verify password length. But further down the chain, passwords are checked to make sure they are longer than four characters.
If during initial setup, the user enters a password that is shorter than four characters, this will not be caught here, but when the script actually calls management/mailconfig.py to add the user, it will fail without a chance to correct the short password.
The setup script will then continue without an inital user being created and this will confuse users.
