Another hack to allow URNs in fields which are actually named UUIDs (for nodes/components this time).
Another hack to allow URNs in fields which are actually named UUIDs
(for nodes/components this time).

Ultimately, it will be safe to assume that everything both is and is
named a URN, and this mess will go away.

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