pgsql: Allow multiple --temp-config arguments to pg_regress

Allow multiple --temp-config arguments to pg_regress

This means that if, for example, TEMP_CONFIG is set and a Makefile
explicitly sets a temp-config file, both will now be used.

Patch from John Gorman.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/26fdff1b8f76f3c47d4e19be7c4aef3cdcd3393c

Modified Files
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src/test/regress/pg_regress.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

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