IPF state tables

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

Two questions on IPF's state tables:

1. What units are fr_state{size,max} in and how many of these do I need to 
   store one state? Or the other way round: If I want to keep n states, what 
   do I set these to and how much kernel memory will that cost?
2. How can I find out how many states ipf is currently remembering? I.e. how 
   close am I currently to losing state?