Amit Kapila a6a0ae127e Revert "Remove unused wait events."
This reverts commit 671eb8f34404d24c8f16ae40e94becb38afd93bb. The removed
wait events are used by some extensions and removal of these would force a
recompile of those extensions. We don't want that for released branches.

Discussion: https://postgr.es/m/E1mdOBY-0005j2-QL@gemulon.postgresql.org
2021-10-26 08:19:33 +05:30
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2021-10-26 08:19:33 +05:30