[Dovecot] Yet another going from 1.2 to 2.X question: authentication

[Mauricio Tavares]

So in 1.2.9 I had something like this:

[...]

socket listen {
        master {
                path = /var/run/dovecot/auth-master
                mode = 0600
                user = virtual # User running Dovecot LDA's deliver
        }
}

# Dovecot as SASL Auth
socket listen {
        client {
                path = /var/spool/postfix/private/dovecot-auth
                mode = 0660
                user = postfix
                group = postfix
        }
}

I see I can, per http://wiki2.dovecot.org/HowTo/PostfixAndDovecotSASL,
setup the sasl entry as

# Dovecot as SASL Auth
service auth {
        unix_listener /var/spool/postfix/private/dovecot-auth
        mode = 0660
        user = postfix
        group = postfix
}

what about the lda? From http://wiki2.dovecot.org/LDA I take it would
be as simple as

service auth {
        unix_listener auth-userdb {
                mode = 0600
                user = virtual # User running Dovecot LDA's deliver
        }
}

Am I correct?