print warning for useless dirtab rules
print warning for useless dirtab rules

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