NGX_HTTP_COPY_BUFFERED  155 src/http/ngx_http_copy_filter_module.c         r->buffered &= ~NGX_HTTP_COPY_BUFFERED;
NGX_HTTP_COPY_BUFFERED  158 src/http/ngx_http_copy_filter_module.c         r->buffered |= NGX_HTTP_COPY_BUFFERED;