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_6_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/484a4667bbed9c0c3ee47a41a75ea8d7c48444e5

Modified Files
--------------
doc/src/sgml/event-trigger.sgml | 70 +++++++++++++++++++++++++++++++++++++++--
1 file changed, 67 insertions(+), 3 deletions(-)