[sork] patch: allow to use any LDAP attribute as passwd

[Chuck Hagenbuch]

Quoting Guillaume Rousse <rousse at ccr.jussieu.fr>:

> The following patch allows to use any attribute as target in LDAP driver
>   for passwd application. I needed it as courrier-imap use a
> 'clearPassword' attribute for mail password for encrypted
> autenthication. A new 'attribute' key is added in backend parameters,
> which defaults to 'userPassword', ensuring backward compatibility.

Committed, thanks!

-chuck

--
"Regard my poor demoralized mule!" - Juan Valdez