pgsql: Refer to a TOKEN_USER payload as a "token user, " not as a "user

Refer to a TOKEN_USER payload as a "token user," not as a "user token".

This corrects messages for can't-happen errors.  The corresponding "user
token" appears in the HANDLE argument of GetTokenInformation().

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/c22650cd6450854e1a75064b698d7dcbb4a8821a

Modified Files
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src/backend/libpq/auth.c | 2 +-
src/common/exec.c        | 7 ++-----
2 files changed, 3 insertions(+), 6 deletions(-)