[imp] secure connection only

[Chris Crowley]

> Well, checking the apache docs, and trying lots of things.... I found that
> this was the best solution:
>
> RewriteEngine On
> RewriteRule /horde/imp/.* https://math.unl.edu.ar/horde/imp/ [R]
>

Interesting. I do not have rewrite compiled in, so it wasn't an option. But
now I am curious.

Does the server now rewrite all of the urls redundantly? Imp is smart enough
for all links to be SSL once you connect to it that way. (Pass your mouse
over the navigation bar links.)

The benefit seems to be that you will never get a "page contains secure and
non-secure items."

Chris