Обсуждение: pgsql: Doc: improve documentation about postgresql.auto.conf.

Doc: improve documentation about postgresql.auto.conf.

Clarify what external tools can do to this file, and add a bit
of detail about what ALTER SYSTEM itself does.

Discussion: https://postgr.es/m/aed6cc9f-98f3-2693-ac81-52bb0052307e@2ndquadrant.com

Branch
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REL_12_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/372d6a8918e03f182242b260902dd47e5c5dd6e5

Modified Files
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doc/src/sgml/config.sgml | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)