Ceph

In various places we assert conditions are true on shutdown. We would really prefer not to do that for users when it's just internal bookkeeping. See #21737 for one example.

I tried to do a general audit for this by going through destructors, but the best regex I could come up with was:

git grep "~[a-zA-Z]*()[^}]*{[^}]*" -- src/

That returned 783 results. Many of them are actually empty, but all my attempts to exclude those failed, for my regex-fu was not strong enough. (The plan I had was to find a regex that only returned non-empty implementations, then stick a "-A 20" or similar on it, and then search the results for "assert", which ought to have a high enough real hit ratio to be useful.)