pgsql: Doc: Fix event trigger firing table

Doc: Fix event trigger firing table

The table has not been updated for some commands introduced in recent
releases, so refresh it. While on it, reorder entries alphabetically.

Backpatch all the way down for all the commands which have gone
missing.

Reported-by: Jeremy Smith
Discussion: /messages/by-id/15883-afff0ea3cc2dbbb6@postgresql.org
Backpatch-through: 9.4

Branch
------
REL9_5_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/d452d0cf6fd37bc7a59f9604a4ad06a2d86cf44e

Modified Files
--------------
doc/src/sgml/event-trigger.sgml | 56 ++++++++++++++++++++++++++++++++++++++---
1 file changed, 52 insertions(+), 4 deletions(-)