FIX: cvmfs-keys package download url guessing
FIX: cvmfs-keys package download url guessing

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