VMM/Config: removed the default value of misc.dovecot_version. There are too many different versions installed on different systems. So, it doesn't make much sense to have a default value.

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

MISSING_ARGS = 1
UNKNOWN_COMMAND = 2
USER_INTERRUPT = 3