NGX_LOWLEVEL_BUFFERED  197 src/http/ngx_http_write_filter_module.c         && !(c->buffered & NGX_LOWLEVEL_BUFFERED)
NGX_LOWLEVEL_BUFFERED  313 src/http/ngx_http_write_filter_module.c     if ((c->buffered & NGX_LOWLEVEL_BUFFERED) && r->postponed == NULL) {