pgsql: doc: libpq connection options can override command-line flags

doc: libpq connection options can override command-line flags

Reported-by: Alexander Lakhin

Discussion: /messages/by-id/16486-b9c93d71c02c4907@postgresql.org

Backpatch-through: 9.5

Branch
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REL9_6_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/cf42550d513169b3687785015d241c87b9cf87cd

Modified Files
--------------
doc/src/sgml/ref/clusterdb.sgml | 5 ++++-
doc/src/sgml/ref/pg_basebackup.sgml | 5 +++--
doc/src/sgml/ref/pg_dump.sgml | 12 ++++--------
doc/src/sgml/ref/pg_dumpall.sgml | 5 +++--
doc/src/sgml/ref/pg_isready.sgml | 14 +++++---------
doc/src/sgml/ref/pg_recvlogical.sgml | 14 ++++++++------
doc/src/sgml/ref/pg_restore.sgml | 5 ++++-
doc/src/sgml/ref/psql-ref.sgml | 25 +++++++++++--------------
doc/src/sgml/ref/reindexdb.sgml | 5 ++++-
doc/src/sgml/ref/vacuumdb.sgml | 5 ++++-
10 files changed, 50 insertions(+), 45 deletions(-)