[imp] shared folder acl editing

[Liam Hoekenga]

>> and then an empty drop down under my username.  It doesn't contain  
>> any options, nor does it allow me to add a new user.
>
> You only get the drop down if you configured your authentication  
> backend to be able to list users. But it doesn't list any.

so... if our authentication backend could list users, what exactly  
would we see in the drop down?

We have 140k unique users that have used our horde installation, and  
that list doesn't exactly match to the users who actually have  
accounts in our IMAP installation (users that have accounts that don't  
use webmail /and/ users who have used webmail who no longer have  
accounts).

It seems like the UI should have a way to enter the username of an  
arbitrary user.

Liam