--TEST-- http_send_data() etag caching --SKIPIF-- --ENV-- HTTP_IF_NONE_MATCH="0bee89b07a248e27c83fc3d5951213c1" --FILE-- --EXPECTF-- Status: 304 Content-type: text/html X-Powered-By: PHP/%s Cache-Control: private, must-revalidate, max-age=0 %s