Update Plinth to handle new Apache config:
Update Plinth to handle new Apache config:

- Remove custom https redirect code.
- Hang Plinth off of any directory.
freedomboxtwh/Plinth,freedomboxtwh/Plinth,vignanl/Plinth,kkampardi/Plinth,vignanl/Plinth,kkampardi/Plinth,jvalleroy/plinth-debian,jvalleroy/plinth-debian,kkampardi/Plinth,kkampardi/Plinth,kkampardi/Plinth,freedomboxtwh/Plinth,freedomboxtwh/Plinth,jvalleroy/plinth-debian,harry-7/Plinth,freedomboxtwh/Plinth,vignanl/Plinth,harry-7/Plinth,jvalleroy/plinth-debian,harry-7/Plinth,vignanl/Plinth,harry-7/Plinth,vignanl/Plinth,harry-7/Plinth,jvalleroy/plinth-debian