if (compat20 && (datafellows & SSH_BUG_DEBUG)) return;
packet_send_debug(const char *fmt,...){	char buf[1024];	va_list args;	va_start(args, fmt);	vsnprintf(buf, sizeof(buf), fmt, args);	va_end(args);	if (compat20) {		packet_start(SSH2_MSG_DEBUG);		packet_put_char(0);	/* bool: always display */		packet_put_cstring(buf);		packet_put_cstring("");	} else {		packet_start(SSH_MSG_DEBUG);		packet_put_cstring(buf);	}	packet_send();	packet_write_wait();}