[imp] Can't get 3.0 rc2 to work at all

[Lars Hecking]

> >  - /webmail is aliased to /horde/imp
> >  - all access into /horde is rewritten as /webmail
> 
> This is wrong. IMP relies on being able to access things in /horde - it looks 
> like you are re-writing requests to /horde to go to /horde/imp, which is not 
> going to work.
 
 Then it shouldn't work with imp 2.2.x either - but it does.

 If I remove this Rewrite clause, I get dumped into /imp, which doesn't
 exist.

> Keep your alias of /webmail -> /horde/imp, but take out any rewrites on 
> /horde itself.
> 
> Make sure Horde's 'webroot' in horde/config/registry.php is set to /horde, 
> and IMP's 'webroot' is set to /webmail.
 
 Both ok.

> Then access IMP as /webmail, but anything accessing /horde will find it.
> 
> Creat aliases for turba in Apache if you want also, and set its 'webroot' to 
> that alias, or access it as /horde/turba