Option: joystick_port_2_mode

Default: nothing
Example: joystick
Specify what emulated Amiga device is connected to joystick port 2.
Valid values are:
* joystick
* nothing
Code:
    if c.joystick_port_2_mode.explicit:
        value = c.joystick_port_2_mode.explicit
    else:
        # FIXME: depends on actual device in joystick_port_2...?
        value = "nothing"