[BusyBox] dhcpc: broadcast flag

[Russ Dill]

> - Make sure the xid field is really random (it seems to be 0 always)


udhcp has two ways of attempting to seed random numbers. It will either
read from /dev/urandom, or use time(0). For some embedded system,
neither works, since each system will have the same value for both,
since there is often nothing variable in the bootup. This can be solved
with an "ifconfig eth0 > /dev/urandom" effectively seeding the kernel
entropy pool with the system's arp address.

However, in your case, you have an xid of 0. It is extremely unlikely
that udhcpc is sending out an xid of zero. I think you have a buggy
network and/or dhcp server.