Add a TODO for bugfix

When suffix is used in logline format a "\n" is missing...

src/logger.c

 char* vpyfcgi_logger_format_message(pyfcgi_logger_format_t *fmt,
 	loglvl_t lvl, const char* message, size_t fmt_msg_len)
 {
+	/**@todo Add '\n' when suffix is used ! */
 	char *_msgptr;
 	size_t maxlen;
 	int ret;