Thread: pgsql: Fix incorrect value for "strategy" with deflateParams() in walme

Fix incorrect value for "strategy" with deflateParams() in walmethods.c

The zlib documentation mentions the values supported for the compression
strategy, but this code has been using a hardcoded value of 0 rather
than Z_DEFAULT_STRATEGY.  This commit adjusts the code to use
Z_DEFAULT_STRATEGY.

Backpatch down to where this code has been added to ease the backport of
any future patch touching this area.

Reported-by: Tom Lane
Discussion: https://postgr.es/m/1400032.1662217889@sss.pgh.pa.us
Backpatch-through: 10

Branch
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REL_12_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/adb371c9cd95ad48cbcedb21a8cb9b0208295dc6

Modified Files
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src/bin/pg_basebackup/walmethods.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)