Log Message:
-----------
Add a comment explaining one of the ways that pgbench fails to fully
comply with TPC-B. Per Itagaki Takahiro and discussion of bug#3681.
Modified Files:
--------------
pgsql/contrib/pgbench:
pgbench.c (r1.76 -> r1.77)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pgbench/pgbench.c?r1=1.76&r2=1.77)