// receives a SETTINGS frame whose stream identifier
		// field is anything other than 0x0, the endpoint MUST
		// respond with a connection error (Section 5.4.1) of
		// type PROTOCOL_ERROR.
		countError("frame_settings_has_stream")
		return nil, http2ConnectionError(http2ErrCodeProtocol)
	}
	if len(p)%6 != 0 {
		countError("frame_settings_mod_6")
		// Expecting even number of 6 byte settings.