[Dovecot] Convert plugin question

[Dmitry Filonov]

Hi,

Is it possible to change convert plugin, so it would keep old 
UIDVALIDITY and UIDNEXT after conversion from mbox to Maildir?
As far as I can tell, this shouldn't be a big problem as this 
information already exists in the mbox. Well, at least for mboxes, that 
have
that information.

 The problem is easy, if UIDVALIDITY changes during conversion, then 
client has to reload whole mailbox from the server. And this is
not easy for users with 5+ Gb of mail.

Thanks,

FiL