distinguish between ENOENT and EIO during path lookups in other fuse callbacks
distinguish between ENOENT and EIO during path lookups in other fuse callbacks

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