Does anyone feel that it is ok to break the mapping in sys/net/netisr.h
from address family number to soft interrupt bit number ?

The next free address family number is 31, which conflicts with NETISR_PPP
if __HAVE_GENERIC_SOFT_INTERRUPTS isn't defined.

Any address family numbers after this that need a soft interrupt will
overflow the int netisr variable anyway.

Robert Swindells