Define whether $select=* returns only structural properties or also navigation properties

The URL conventions state that

If the selectItem is a star, then all properties and navigation properties on the matching resources MUST be returned.

This conflicts with the JSON format which by default does not return navigation properties and only includes them when odata.metadata=full is requested.

The recent enhancements to $expand which allows nesting e.g. a $select further reduces the need for $select=*, so it's best to remove it altogether.