[Dovecot] LIST-EXTENDED support?

Hi there.

Can I check if LIST-EXTENDED refers to RFC 6154 (http://tools.ietf.org/html/rfc6154), rfc for special use mailboxes.

I'd like to specify a designated folder as \Spam and etc. Googling
"dovecot list-extended" and "dovecot special use" suggests that dovecot supports this feature (via patch logs and 1 bug report for Mozilla Thunderbird which suggests that dovecot supports this).

However when trying to test this feature via thunderbird, it would seem to suggest that it is not currently possible. (Moving folders that Thunderbird has created forces thunderbird to recreate said folder in it's original location)

# dovecot --version 1.2.17

Any help/pointers appreciated.

Cheers.