pgsql: Fix set of NLS translation issues

Fix set of NLS translation issues

While monitoring the code, it has been noticed that GSSAPI
authentication missed two translations.

Reported-by: Kyotaro Horiguchi
Author: Kyotaro Horiguchi
Reviewed-by: Michael Paquier, Tom Lane
Discussion: https://postgr.es/m/20180810.152131.31921918.horiguchi.kyotaro@lab.ntt.co.jp
Backpatch-through: 9.3

Branch
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REL9_3_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/f64e65bd76ef1ae41d2dcbdb37c09fc015b5ccac

Modified Files
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src/backend/libpq/auth.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)