[dev] Groups patch

[Chuck Hagenbuch]

Quoting Carlos Pedrinaci <cpedrinaci at yahoo.es>:

> The Group::listAllUsers function seemed to be buggy.
> The root group was listed twice and the users were not obtained correctly
> because it was calling listUsers using the groupName and not the groupID.

Carlos - sorry, can you put this into bugs.horde.org so it doesn't get 
lost? I haven't been able to get to it yet.

-chuck

-- 
"But she goes not abroad in search of monsters to destroy." - John 
Quincy Adams