[mimp] default identity's address getting set incorrectly

[Liam Hoekenga]

> Have MIMP do its own auth (use the composite auth driver and have MIMP 
> do auth for mobile browsers - see the wiki).

When I go to...

     http://wiki.horde.org/display.php?referrer=HowTo&page=MIMPHowTo

I get..

"You don't have permission to view this page."

Liam