prevent ctrl+c during cvmfs_config reload
prevent ctrl+c during cvmfs_config reload

alhowaidi/cvmfsNDN,Gangbiao/cvmfs,trshaffer/cvmfs,trshaffer/cvmfs,djw8605/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,djw8605/cvmfs,Moliholy/cvmfs,reneme/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,alhowaidi/cvmfsNDN,reneme/cvmfs,alhowaidi/cvmfsNDN,reneme/cvmfs,djw8605/cvmfs,Gangbiao/cvmfs,Moliholy/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs,reneme/cvmfs,alhowaidi/cvmfsNDN,trshaffer/cvmfs,trshaffer/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,trshaffer/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,alhowaidi/cvmfsNDN,djw8605/cvmfs,reneme/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs