Add fetching of the sig file. This is always attempted, since the descriptor does not indicate that one exists (but I have a plan for this). So for now, we try to fetch it and if it fails, we ignore the error. Mike says we can build the sig file offline if we have to.
Add fetching of the sig file. This is always attempted, since the
descriptor does not indicate that one exists (but I have a plan for this).
So for now, we try to fetch it and if it fails, we ignore the error. Mike
says we can build the sig file offline if we have to.

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