[Samba] Rename domain during classicupgrade step?

[Sebastian Arcus]

I can see in the docs that a domain rename is not recommended/supported 
by Samba for an already provisioned domain. However, what I can't work 
out is if this is not possible during the classicupgrade step either? 
Does this make any difference, or would it present the same difficulties 
as renaming an already provisioned Samba AD?

It case what I'm asking is not quite clear - I have a Samba NT style 
domain - and I would like to change its name when I use classicupgrade 
to migrate it to an AD style domain. Can this be done?