prep for GA release.
    
    Ordinary release have Release values in the form of X.
    Prereleases, e.g. release candidates, have Release values in the form 0.X.
    
    I.e. following Fedora NVR (name, version, release) rules, _ordinary_
    releases have NVRs like nfs-ganesha-2.0.0-X.fc21.x86_64.rpm, while
    prereleases have NVRs like nfs-ganesha-2.0.0-0.X.rcY.fc21.x86_64.rpm.
    
    This convention allows the GA updates to apply correctly when someone
    has installed a prerelease RPM.