Fix for cache directory on tmpfs
Fix for cache directory on tmpfs

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