Thread: pgsql: Clean up pg_SSPI_error() coding a little bit: make the messages

Log Message:
-----------
Clean up pg_SSPI_error() coding a little bit: make the messages more
consistent, translate where intended, const-ify declarations.
Resolves a gripe from Alvaro as well as some stuff I didn't like.

Modified Files:
--------------
    pgsql/src/backend/libpq:
        auth.c (r1.178 -> r1.179)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/libpq/auth.c?r1=1.178&r2=1.179)
    pgsql/src/interfaces/libpq:
        fe-auth.c (r1.140 -> r1.141)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-auth.c?r1=1.140&r2=1.141)