Add psql option:

doc/src/sgml/ref/pg_restore.sgml

doc/src/sgml/ref/psql-ref.sgml

src/bin/pg_dump/pg_backup.h

src/bin/pg_dump/pg_backup_archiver.c

src/bin/pg_dump/pg_restore.c

src/bin/psql/command.c

src/bin/psql/command.h

src/bin/psql/help.c

src/bin/psql/startup.c