Re: clarifying trigger/rule behavior on logical replication subscribers

Hi.

I have made a patch v2.

This addresses the following:
- [1] Vignesh's review comment about unclosed SGML literal tag.
- [2] Euler's review comment about the word "replica"

But I did not address Euler's other review suggestion [2] about giving
direct links, because actually this patch text (without any direct
links) is almost identical with the existing
"session_replication_role" docs [3]. Instead of making the scope of
this patch bigger, if direct links are really wanted, I thought it is
better to have a separate patch for that which can address both docs.

~~~

I also tested/attached back-patches of the v2 patch for earlier
PostgreSQL versions. Actually, it turns out all the patches are the
same -- just named differently.

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[1] https://www.postgresql.org/message-id/CALDaNm1fAaeOhdTts3LgXs_e1TPZke3-HqFA9b8ZjVXOM66H5Q%40mail.gmail.com
[2] https://www.postgresql.org/message-id/288747bd-911b-4370-8db2-6ecbb096037e%40app.fastmail.com
[3] https://www.postgresql.org/docs/devel/runtime-config-client.html

Kind Regards,
Peter Smith.
Fujitsu Australia