pgsql: Fix oversights in pg_basebackup's -z (compression) option.

Fix oversights in pg_basebackup's -z (compression) option.

The short-form -z switch didn't work, for lack of telling getopt_long
about it; and even if specified long-form, it failed to do anything,
because the various tests elsewhere in the file would take
Z_DEFAULT_COMPRESSION (which is -1) as meaning "don't compress".

Per bug #6060 from Shigehiro Honda, though I editorialized on his patch
a bit.

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/dc014e0446f5bfb52129fc6781a98b236d8166c6

Modified Files
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src/bin/pg_basebackup/pg_basebackup.c |   14 +++++++-------
1 files changed, 7 insertions(+), 7 deletions(-)