It was, in fact, buggy. Alternatives have been proposed but are
yet to be correct.
Things to be done before 1.8 release (but not necessarily before branching):
* Documentation fixes (which ones?)
-* Investigate "lockless path through d_revalidate" for potential issues (?)
+* [reverted] Investigate "lockless path through d_revalidate" for potential issues (?)
* Consider defaulting Unix CMs to have crypt mode be the default, and use
authenticated connections to the VL server.