Break the implementation between the Ofs and the Cms (Cluster Management System)
libraries. The Ofs object is responsible for replying to stat requests that come
form the manager higher up in the hierarchy. The Cms object is responsible for
translating the lfn to a pfn (as it is in EOS) and checking that the file actually
exist in EOS by issuing stat calls aginst EOS.
Add example configuration files for the FED xrootd+cmsd daemons
and RUCIO xrootd daemon which need to run on the box for the Rucio
translation to work.