Upgrade from Cyrus SASL 1.5.27

[Rick Schippers]

We have a Cyrus IMAP server with a Cyrus SASL 1.5.27 sasldb backend. We 
are planning to install a new Cyrus IMAP server with a MySQL backend and 
Webcyradm. The setup of the new server went fine, but it would be 
extremely nice if we could convert our old sasldb to the new MySQL 
backend. The old Cyrus SASL was compiled with gdbm and rc4 support. I've 
been able to read out all the user accounts fromt the sasldb but haven't 
been able to retrieve the passwords, just in the old encrypted form 
which is different from the encryption the new server uses. Is there any 
way to decrypt/convert the old passwords?

Rick