Log Message:
-----------
vacuum_cost_limit has a minimum value of 1, not zero; update
postgresql.conf comment to match.
Modified Files:
--------------
pgsql/src/backend/utils/misc:
postgresql.conf.sample (r1.233 -> r1.234)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/postgresql.conf.sample?r1=1.233&r2=1.234)