pgsql: Fix untranslatable assembly of libpq connection failure message

Fix untranslatable assembly of libpq connection failure message

Even though this only affects the insertion of a parenthesized word,
it's unwise to assume that parentheses can pass through untranslated.
And in any case, the new version is clearer in the code and for
translators.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/fcd4575905608a6dd0868bd6ab99f3e06a743152

Modified Files
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src/interfaces/libpq/fe-connect.c | 46 +++++++++++++++++++++----------------
1 files changed, 26 insertions(+), 20 deletions(-)