VMM/Config: LazyConfigOption.__init__() cast 'default' to 'cls'.
If the default value is not None, make sure it has the proper type.
# 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=postfixpassword=some_password# The database name on the servers.dbname=mailsys# The SQL query template used to search the databasequery=SELECTmaildirFROMpostfix_maildirWHEREaddress='%s'