Log Message:
-----------
Add unit documentation for various postgresql.conf settings.
Modified Files:
--------------
pgsql/src/backend/utils/misc:
guc.c (r1.499 -> r1.500)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c?r1=1.499&r2=1.500)
postgresql.conf.sample (r1.257 -> r1.258)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/postgresql.conf.sample?r1=1.257&r2=1.258)