VMM/Account: some modifications and small improvements in class Account.
- replaced the tid by a Transport instance
- check mailbox format dependencies in _repare()
- reset all attributes when the Account was deleted
- don't select information, we have already, from the db
- added __nonzero__() method
# All parameters are described in pgsql_table(5) / PGSQL PARAMETERS
#
# The hosts that Postfix will try to connect to and query from.
hosts = localhost
# The user name and password to log into the pgsql server.
user = postfix
password = some_password
# The database name on the servers.
dbname = mailsys
# The SQL query template used to search the database
query = SELECT transport FROM postfix_transport WHERE address='%s'