Doh! For jailconfig we could deref a null pointer.
Doh! For jailconfig we could deref a null pointer.

Apparently we don't always set interfaces.mask in the DB for the cnet
interface. So the mysql query returns NULL, which we would happily strcpy!
Now we use CONTROL_NETMASK if the queried value is null.

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