18f9f69 schema: Allow interleaving the /domain/os/type element

Authored and Committed by Peter Krempa 9 years ago
    schema: Allow interleaving the /domain/os/type element
    
    The element wasn't declared under the interleave thus it was required
    always to be first. This made it inconvenient when pasting new stuff to
    the XML manually in the "wrong" place.