[imp] Getting imp/horde to work in a virtual host

[Chuck Hagenbuch]

Quoting Doug Reynolds <mav at wastegate.net>:

> I hope this topic hasn't been beaten to death; however, I am having  
> trouble getting IMP to authenticate and login when I have horde in  
> the webroot of / and imp in /imp.
>
> I've tried the the methods in the faq and wiki (ie, adding the  
> /horde/ and /imp/ alias into my apache config, setting the webroot  
> in the horde config in the registry.php to '' and also '/' will no  
> avail).

You need to set the cookie_path appropriately also (to '/').

-chuck