uftpd(1) on Linux
The text e17d93fee4a7, as Debian 10 (Buster) shipped it.
Encrypted UDP based ftp with multicast - client daemon
Flags it lists
-
-A -
-D -
-E -
-H -
-I -
-M -
-R -
-d -
-i -
-k -
-m -
-q -
-t