[Dovecot] 2.0/2.1 - different behavior for LIST-EXTENDED

[Peter Mogensen]

Hi Timo,

We are sitting here wondering if this difference in behaviour between 
dovecot 2.0.17 and 2.1.3 is intended.

When you create a folder, subscribe to it and rename it (without 
changing the subscription) these are the behaviours:

For 2.0.17:
. list (SUBSCRIBED) "" "*" RETURN (STATUS (MESSAGES))
* LIST (\Subscribed \NonExistent) "." "INBOX.test"

For 2.1.3:
. list (SUBSCRIBED) "" "*" RETURN (STATUS (MESSAGES))
* LIST (\Subscribed) "." "INBOX.test"
* NO Mailbox doesn't exist: test

If you don't use rfc5819 the folder will just get silently ignored by 
dovecot 2.1.x, but if you actually try to get the number of messages 
you'll get the error.

It seems to me from reading rfc5258 that the 2.0.x behaviour is the 
correct ??

/Peter