toshiba tecra 8000 pcmcia slots in docking station

[kegwasher <washer_of_kegs@t-online.de>]

I can see the slots with dmesg or the info app but have had no luck to get a
network card seen there.  I can put it in the laptops slots and it works
fine.  Just not in the dock.  I have read about an option extra_slots but
have not been able to find where to put it.  Any hints?