[BUG] Dovecot incorrect spam folder

[unihostbrasil]

The ./build dovecot_conf currently ignores the option directadmin.conf/spam_inbox_prefix.

Even with the spam_inbox_prefix=1 option (which is the DirectAdmin default), the /etc/dovecot/conf/namespace_private.conf file uses the SPECIAL-USE flag "\Junk" in the wrong folders:

    mailbox Junk {
        special_use = \Junk # autocreate Junk, but don't autosubscribe
        auto = create
    }

    mailbox spam {
        special_use = \Junk
        auto = no
    }

    mailbox Spam {
        special_use = \Junk
        auto = no
    }

Should be:

    mailbox INBOX.spam {
        special_use = \Junk
        auto = subscribe
    }