VMM/password: moved the 'scheme check' code from pwhash() to the new function verify_scheme(). VMM/Config: use verify_scheme() to check the scheme when LazyConfig.set() is called.

# -*- coding: UTF-8 -*-
# Copyright (c) 2007 - 2010, Pascal Volk
# See COPYING for distribution information.

MISSING_ARGS = 1
UNKNOWN_COMMAND = 2
USER_INTERRUPT = 3