RE: issue with synchronized_standby_slots

Dear Shlok,

> I agree that .pg_reload_conf() is not required. I have removed it in
> the latest version of patches.

Thanks for updating the patch!
After considering bit more, I started to feel the test should be under the
test/modules/unsafe_tests. Adding test requires that wal_level >= replica and
max_logical_replication_slots >= 1, but `make installcheck` might allow to run
such an environment. unsafe_tests can ensure that test would be run only while
`make check`. Also, ALTER SYSTEM requires to be superuser and the test has
already used the privileges.

Best regards,
Hayato Kuroda
FUJITSU LIMITED