Fix the disaster that was version 1.42.2.12.4.1.2.7 of cnxman.c
    
    The comparision function now actually works (ie it looks like the one I
    thought I had stolen from jiffies.h), and cman keeps a track of all sequence
    numbers received as well as those that need ACKs, so each node has an idea
    of where each other node's sequence nubers are. otherwise we don't know what
    is a delayed packet and what isn't.