DescriptorUnit complications

With the release of 2.0.8, working with LEnts just got a bit more complicated, as the LSec holding the LEnts now requires an appropriate DescriptorUnit.

The upcoming 2.0.9 restricts the use of headers, which is fine except that you want to be able to use headers in DescriptorUnits. As a header is used to allow the use of headers, it becomes a bit of a catch-22 situation. Of course, you could always post the initial DescriptorUnits from CompStrm or cal.

Rather than require such tricks, perhaps it would be best to always allow headers in DescriptorUnits.