obsolete: extract obsolescence marker pushing into a dedicated function Having a dedicated function will allows us to experiment with other exchange strategies in an extension. As we have no solid clues about how to do it right, being able to experiment is vital. I intended a more ambitious extraction of push logic, but we are far too advanced in the release cycle for it.

blackbox: fix a case of name capture

pathencode: eliminate comma at end of enum list to avoid pedantic warning