[Exim] Feature request / wishlist addition

I would like the append file transport modified to support multiple hard
links to a single file when using the MailDir format.

If a single message is sent to a large # of users, that message will be
stored once for each user. However, if the append file transport supported
hard linking then one copy of the file could be stored on disk, but appear
in multiple user's maildirs.

Thanks
Rob