cr.yp.to FTP service changing

Warning to mirror operators: URLs of the form ftp://cr.yp.to/whatever
are going away. URLs of the form ftp://ftp.cr.yp.to/whatever will last
somewhat longer, but eventually I'm going to eliminate all FTP service.
This does not mean that HTTP crawling is encouraged; I'm going to start
supporting low-bandwidth update notifications before I disable FTP
service.

---D. J. Bernstein, Professor, Mathematics, Statistics,
and Computer Science, University of Illinois at Chicago