[Dovecot] @2.0, Fatal error (Expecting '=') in trash plugin config

[PGNet Dev]

i've setup trash plugin as,

        grep trash imap.conf
                mail_plugins = autocreate fts fts_squat fts_solr imap_quota 
quota trash zlib

        cat plugin.conf
                plugin {
                  ...
                  trash = /data/mail/Conf/dovecot/conf.d/trash.conf
                }

        cat /data/mail/Conf/dovecot/conf.d/trash.conf
                1 Spam
                2 Trash
                3 Sent
                3 Sent Messages

but, @

        dovecot -n
                # 2.0.alpha1: /data/mail/Conf/dovecot/dovecot.conf
                doveconf: Fatal: Error in configuration file
/data/mail/Conf/dovecot/conf.d/trash.conf line 1: Expecting '='

bug, or change frp, v1.x in config/parsing?