Moved VirtualMailManager/Exceptions to VirtualMailManager/errors.
Renamed VMM*Exception classes to *Error.
No longer add the attribute 'message' to VMMError if it doesn't exist, like in
Python 2.4. It has been deprecated as of Python 2.6.
Also removed the methods code() and msg(), the values are now accessible via
the attributes 'code' and 'msg'.
-- ---
-- with Dovecot v1.2.x the service managesieve was renamed to sieve
-- ---
ALTER TABLE users RENAME managesieve TO sieve;
DROP VIEW dovecot_password;
CREATE OR REPLACE VIEW dovecot_password AS
SELECT local_part || '@' || domain_name.domainname AS "user",
passwd AS "password", smtp, pop3, imap, sieve
FROM users
LEFT JOIN domain_name USING (gid);