Package: ftp.debian.org Severity: normal Upstream [1] says "ceased development", last release was in 2011. Upstream recommends some replacements, among them are also at least one already in Debian.
So it is probably best to let it go. There are no reverse deps. [1] http://www.haildb.com/2015/08/19/shutting-down-haildb/ -- tobi
