The new "Junk" virtual folder in Evolution 2.0 hides the "Junk" folder I
have on my IMAP account.  The Junk folder does not appear to be disabled by
any setting, nor is it available in the list of vfolders, so I can't find
any way to remove it.

Ideally, Evolution should detect whether the remote server already has a
folder of the same name and act accordingly.

This is a major problem for interoperability with other mail clients, as it
presents a different (incorrect) view of the user's mail and makes it
impossible to see the contents of any real folder of the same name, as is
common on systems that implement server-side filtering (many advanced users
are likely to have such a configuration, and some of the better webmail
services do similarly).