Function construct_custom_netdir_with_geoip 

pub fn construct_custom_netdir_with_geoip<F>(
    func: F,
    db: &GeoipDb,
) -> BuildResult<PartialNetDir>
where
    F: FnMut(usize, &mut NodeBuilders, &mut MdConsensusBuilder),

As construct_custom_netdir(), but with a GeoipDb.