[imp] Allowing users to choose IMP or MIMP

[Chuck Hagenbuch]

Quoting Kevin Konowalec <webadmin at ualberta.ca>:

> What would be the best way to allow users to select MIMP or IMP as
> their mail client on login?  We have a few users with visual
> disabilities and they use page readers to read web pages.  The
> readers don't work very well with IMP so I'd like to allow them to
> use MIMP for the text-only, no frills simplicity of it.  I'd rather
> not have to run a duplicate instance of horde on another machine
> dedicated to the handful of users who need this if I can avoid it.
> I'd be very happy if you could just choose one or the other from the
> login page - is that possible?

Choosing it from the login page has been implemented in HEAD.

-chuck