FIX: Catalog._canonicalize_path() screwed up empty path
FIX: Catalog._canonicalize_path() screwed up empty path

djw8605/cvmfs,MicBrain/cvmfs,reneme/cvmfs,cvmfs-testing/cvmfs,MicBrain/cvmfs,djw8605/cvmfs,reneme/cvmfs,djw8605/cvmfs,DrDaveD/cvmfs,cvmfs-testing/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,reneme/cvmfs,alhowaidi/cvmfsNDN,trshaffer/cvmfs,cvmfs/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,MicBrain/cvmfs,trshaffer/cvmfs,alhowaidi/cvmfsNDN,cvmfs-testing/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,reneme/cvmfs,cvmfs-testing/cvmfs,cvmfs/cvmfs,alhowaidi/cvmfsNDN,MicBrain/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,Moliholy/cvmfs,cvmfs-testing/cvmfs,DrDaveD/cvmfs,MicBrain/cvmfs,trshaffer/cvmfs,DrDaveD/cvmfs,djw8605/cvmfs,Moliholy/cvmfs,trshaffer/cvmfs,Gangbiao/cvmfs,reneme/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs,trshaffer/cvmfs,Moliholy/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,alhowaidi/cvmfsNDN,alhowaidi/cvmfsNDN