Use {USERNODE,FSNODE}_IP to determine the value of ISFS.
Use {USERNODE,FSNODE}_IP to determine the value of ISFS.

It is possible for USERNODE and FSNODE to be set differently but still be
the same machine (we do it, and our defs-default file shows it). This will
badly mess up your ops install. So use the _IP settings instead.

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