Do not drag BuildRequires for RHEL into Fedora
    
    Compatibility build dependencies were kept just for RHEL compatibility.
    They are not precise however. Recent BIND does not require GeoIP-devel,
    but instead libmaxminddb-devel. Use compatibility only for old RHEL,
    which does not require correct dependencies from bind-devel.
    
    Let it handle correctly by bind-devel for more recent BIND packages.
    Enforce required version on recent RHEL.