* path: Base directory to where GeoIP data is located or the full path to where the city or country data files (*.mmdb) are located. Assumes that both the city and country data sets are located in this directory; overrides the GEOIP_PATH setting. * cache: The cache settings when opening up the GeoIP datasets. May be an integer in (0, 1, 2, 4, 8) corresponding to the MODE_AUTO, MODE_MMAP_EXT, MODE_MMAP, MODE_FILE, and MODE_MEMORY, `GeoIPOptions` C API settings, respectively. Defaults to 0, meaning MODE_AUTO. * country: The name of the GeoIP country data file. Defaults to 'GeoLite2-Country.mmdb'; overrides the GEOIP_COUNTRY setting. * city: The name of the GeoIP city data file. Defaults to 'GeoLite2-City.mmdb'; overrides the GEOIP_CITY setting.