Add support for an 'internal' zone file, which can be used along with views, to give different IPs fro boss and ops to internal hosts than to external ones.
Add support for an 'internal' zone file, which can be used along
with views, to give different IPs fro boss and ops to internal hosts
than to external ones.

Needed for Wisconsin.

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