Обсуждение: pgsql: Fix dblink_get_result() as reported by Oleksiy Shchukin.

Log Message:
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Fix dblink_get_result() as reported by Oleksiy Shchukin. Refactor a bit
while we're at it per request by Tom Lane. Specifically, don't try to
perform dblink_send_query() via dblink_record_internal() -- it was
inappropriate and ugly.

Modified Files:
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    pgsql/contrib/dblink:
        dblink.c (r1.77 -> r1.78)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/dblink/dblink.c?r1=1.77&r2=1.78)