[Dovecot] Upgrade to 2.0 - Not so smooth

[Timo Sirainen]

On Mon, 2010-08-16 at 07:16 -0700, Marc Perkel wrote:

> Maybe dovecot could use the "nobody" user if dovenull doesn't exist?

The entire point of dovenull user is that it's not used by anything
else. The only things I'm going to change here is to make the error
message somewhat better for v2.0.1 and add a note about this user to
NEWS file / release announcement.