In the old (pre July 2005) version of this page, download required username and passwd, so that we could collect the email addresses of the people downloading the codes. Since this is no longer possible, if you would like to be informed about changes in the codes, contact L. Sbordone to be added to the list. Consider we probably sent less than 4 emails last year to the list, so you do not risk to be flooded with spam!
Also, people already present in the list who want to to be removed from it, or whose email address changed, should simply contact L. S.