#132 filenameToRealVS may return a master ghost

[Scott Venier]

filenameToRealVS and filenameToMasterVS are both
internally implemented with filenameToSpecialVS.
filenameToSpecialVS always conciders master to
be "higher" then non-ghost.

In the situation where the master was ghosted but non-
master replicas remain the non-master, non-ghost
should be returned for filenameToRealVS, but instead
the master ghost will be returned.