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
------
REL_12_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/62f6f11d9e2c53ce5b130c8cafe9e12870f1c81d

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_receivewal.sgml | 5 +++--
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 ++++-
11 files changed, 53 insertions(+), 47 deletions(-)