Make it possible to ignore individual newly added dependencies
    
    The -f flag makes it possible to automatically fetch packages
    for newly added dependencies. This usually works fine as long as the
    packages are available from Koji. But in case the given dependency is
    not yet available, the slow Koji package lookup holds back every such
    makeupdates run considerably.
    
    So add a new -i/--ignore option that makes it possible to ignore individual
    package dependencies. Both exact match and globs are supported.