I can add to this: 1) Adding the "ftp" user lets the anonymous and ftp accounts work as expected.
2) The long delay appears to be due to attempting a reverse lookup with avahi. I could find no way to disable reverse lookups in iksd. Most services these days don't do reverse lookups because of the expense of them, and waiting so long for a response seems to be breaking the incoming processes. Probably the postinst script should adduser the ftp account, or, given that iksd is less-used than kermit as a whole, README.Debian should mention it. I am still unable to get the syslog feature to work. - John