Our copy of SFTOPD became obsolete several years ago:

$ sftopd
Unknown record type:
4 0000 <[log in to unmask]> <[log in to unmask]>

It isn't an essential part of day to day operations, obviously, but I
was wondering if a more recent version was available and where.  I didn't
see it during a cursory check of the ftp site this morning.

                                     -Kary