Log Message:
-----------
Document in postgresql.conf that the default units for
log_min_duration_statement is milliseconds.
Modified Files:
--------------
pgsql/src/backend/utils/misc:
postgresql.conf.sample (r1.255 -> r1.256)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/postgresql.conf.sample?r1=1.255&r2=1.256)