NGX_HTTP_LAST_2XX   66 src/http/ngx_http_header_filter_module.c #define NGX_HTTP_OFF_3XX   (NGX_HTTP_LAST_2XX - 200)
NGX_HTTP_LAST_2XX  216 src/http/ngx_http_header_filter_module.c             && status < NGX_HTTP_LAST_2XX)
NGX_HTTP_LAST_2XX  306 src/http/ngx_http_special_response.c #define NGX_HTTP_OFF_3XX   (NGX_HTTP_LAST_2XX - 201)