[PREC/RFA] Add not_replay to make precord support release memory better

[Michael Snyder]

Hui Zhu wrote:
> The record_exec_entry don't have big contact with core dump patch.
> 
> I think the new version is more clear.

But we had this patch all worked out, and now you've added
a bunch of new stuff to it.  It's not a "new version" of the
"add not_replay" patch, it's a whole new change.

That's not the way we do it.  If you want to add new stuff,
you start a new thread, you don't add it into a thread that's
already in review.