NGX_HTTP_LOG_UNSAFE 1914 http/modules/ngx_http_ssi_filter_module.c     flags = NGX_HTTP_LOG_UNSAFE;
NGX_HTTP_LOG_UNSAFE 1577 http/ngx_http_parse.c     if (*flags & NGX_HTTP_LOG_UNSAFE) {
NGX_HTTP_LOG_UNSAFE 1846 http/ngx_http_upstream.c         flags = NGX_HTTP_LOG_UNSAFE;