Interfaces set as disabled in the configuration have an UP status in the operating system at boot
If you disable interface on interfaces.php page it's disabled
there is no UP in ifconfig output and `get_interface_info()` returns 'status' = 'down', 'enable' = 'false'
but after system reboot interface status is UP in ifconfig output and `get_interface_info()` returns 'status' = 'up', 'enable' = 'false', which is incorrect
it seems `interfaces_configure()` doesn't disable interfaces on boot