[sync] Sync using incorrect login name with IMP/IMAP

[Blake Krone]

I have my Horde setup to use IMP for logins. My IMAP server requires the
user to be <username>@<domain>. I have setup all the auth to work properly.
I can login via sync4j using the latest horde cvs releases and it will sync,
however, all the entries are put into the databases as owner of <username>
instead of <username>@<domain>

Besides modifying the code is there an easier way to tell syncml which user
format it should be by forms of a hook?

Thanks