[Samba] Samba* and SQL pass backend

[Damir Dezeljin]

I searched the samba archive but I didn't found information that satisfied 
my questions:
- Is it posible to use MySQL (or any other SQL) for autenticating clients 
on samba server withowt PAM (I don't like PAM, because it requires 
unencrypted communication between client and server)?
- If it is posible, which version of samba supert SQL (Samba-2.3, 
Samba-2.4, Samba-TNG, Samba-3.0alpha17,...)?
- Is there any documentation for setting up samba with such a 
configuration (I need smb.conf parameters at least)?

10x in advance.

Regards,
Dezo