add -e(mpty) parameter to swissknife info
add -e(mpty) parameter to swissknife info

cvmfs/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,djw8605/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,djw8605/cvmfs,trshaffer/cvmfs,trshaffer/cvmfs,djw8605/cvmfs,trshaffer/cvmfs,trshaffer/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,trshaffer/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs