GeoIP              16 http/modules/ngx_http_geoip_module.c     GeoIP      *country;
GeoIP              17 http/modules/ngx_http_geoip_module.c     GeoIP      *city;
GeoIP              27 http/modules/ngx_http_geoip_module.c typedef const char *(*ngx_http_geoip_variable_handler_pt)(GeoIP *, u_long addr);