NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES  362 http/ngx_http_upstream.c     { ngx_string("X-Accel-Expires"), NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES },
NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES 3220 http/ngx_http_upstream.c     if (u->conf->ignore_headers & NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES) {