a0f905bbe9
Currently, if the address/port information of a maxscaled protocol listener is not updated to socket when MaxScale is upgraded to 2.0, maxscaled would not start, with the effect of a user loosing maxadmin after an upgrade. After this change, if address/port information is detected, a warning is logged and the default socket path is used. That way, maxadmin will still be usable after an upgrade, even if the address/port information is not updated.