Fix up fake mac address generation for virtual interfaces. We need them to be unique in the shared node case, but for good measure lets just generate random/unique macs, and then also set the "locally administered" bit (0x02 in the upper octet) cause linux requires it, and we do not want the client side to change the mac if we can avoid it.
Fix up fake mac address generation for virtual interfaces. We need
them to be unique in the shared node case, but for good measure lets
just generate random/unique macs, and then also set the "locally
administered" bit (0x02 in the upper octet) cause linux requires it,
and we do not want the client side to change the mac if we can avoid
it.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome