FIX signed/unsigned compiler warnings and cosmetics
FIX signed/unsigned compiler warnings and cosmetics

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