Re-add documentation recommendation to use gzip/gunzip for archive file
storage.

Branch
------
master

Details
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http://git.postgresql.org/pg/commitdiff/17665f61155babff93ff916f1d080dcc9b5397d3

Modified Files
--------------
doc/src/sgml/backup.sgml |   11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)

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	Subject: pgsql: Adjust various references to GEQO being non-deterministic.
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