mlibbey

Seems like we should probably write a paragraph some other place in the admin guide about this. Do you have suggestions where? (eg, do you remember part of the research...

I'm not really familiar with txn_box syntax, but think in header_rewrite that would be like ``` cond %{READ_RESPONSE_HDR_HOOK} [AND] cond %{STATUS} =404 set-header @newstatus "Resetting upstream response" set-status 200 ```

Not to prevent this one ... but is it worth doing a quick look at https://cache-tests.fyi/#cc-parse to see if there are other quick wins nearby? For instance, I think the...