Website patch: improve language links

[Christian Stimming]

Am Mittwoch, 18. November 2009 schrieb Geert Janssens:
> After: the language link will change the current page to the new language.
>  If the current page is the index page, the index page will be displayed in
>  the new language. If the current page is the download page, the download
>  page will be displayed in the new language.
> 
> Since the change involves no new files, this time I have attached a real
> patch, no tarball :)

Applied, thanks a lot!

Christian