Live migrating index/control files

[Eirik Rye]

> On 26 Apr 2021, at 15:14, Eirik Rye <rye at trojka.no> wrote:
> 
> Both ~/Maildir and /mail/{control,index}/ are separate NFS-mounts, and we now want to consolidate all files to the user's home directory instead. The end goal is to stop using NFS altogether.

Some more background information:

- Running 2.3.13 (89f716dc2)

- The rsync is run from the user's current mapped backend (from `doveadm director status <user>`), in hopes to reduce NFS-related issues

- Kicking is done through one of the directors, to ensure all of the user's connections are kicked.

Best regards,
Eirik