pathutil: mark parent directories as audited as we go Before 0b7ce0b16d8a (pathauditor: change parts verification order to be root first, 2016-02-11), we used to validate child directories before parents. It was then important to only mark the child audited only after we had audited its parent (ancestors). I'm pretty sure we don't need to do that any more, now that we audit parents before children. Differential Revision: https://phab.mercurial-scm.org/D8002