pgsql: doc: warn about security issues around log files

doc:  warn about security issues around log files

Reported-by: Simon Riggs

Discussion: https://postgr.es/m/CANP8+jJESuuXYq9Djvf-+tx2vY2OFLmfEuu+UvwHNJ1RT7iJCQ@mail.gmail.com

Author: Simon Riggs

Backpatch-through: 10

Branch
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REL_14_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/9039e34e7ed26710e49b4c43d8859387cf4f4faf

Modified Files
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doc/src/sgml/config.sgml      | 11 +++++++++++
doc/src/sgml/maintenance.sgml | 20 +++++++++++++++++++-
2 files changed, 30 insertions(+), 1 deletion(-)