Change search attrib for smtp_auth

[Harald Finn�s]

I'm using the controls patch, and have decided to reference my users with the mail attribute rather that uid.

Today I've been having a hard time getting SMTPAUTH to work, and I just figured why; auth_smtp want to use uid for it's searches.

The question then is how I can get auth_smtp to use a different attribute than uid?

Regards,
Harald