make error page work (hacky)
make error page work (hacky)

<jdoc:include> does not seem to be available in error.php. I tried to
use the underlying code to bypass this limitation.

Unfortunately, this commit takes away most of the benefits of the
partials (see bfc9442).

kub-berlin/kub-template,kub-berlin/kub-template,xi/kub-template,kub-berlin/kub-template,xi/kub-template,xi/kub-template