Ultrix-3.1/src/etc/netsetup.READM
netsetup.README:
The netsetup program was modified to include a fix for
the proper handling of subnet bits for the host and
network addresses when they were setup in both the
/etc/rc file and the /etc/networks file. 
The original ULTRIX-11 V3.0 source for netsetup is in the
file named netsetup.cV3.0, while the updated version with
the subnet fix is in netsetup.c.
The fix for subnet bits in the broadcast address (/etc/rc file)
now correctly says "broadcast 128.45.40.0 netmask 255.255.255.0"
instead of: "broadcast 128.45.0.0 netmask 255.255.255.0".
Also, the fix for subnet and hostbits in the /etc/networks file
now says, for example, "ethernet 128.45.40" instead of "ethernet 128.45".
John Dustin  7-APR-86