NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL  364 http/ngx_http_upstream.c     { ngx_string("Cache-Control"), NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL },
NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL 3107 http/ngx_http_upstream.c     if (u->conf->ignore_headers & NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL) {