Log Message:
-----------
Document that datetime year '0' is considered in a recent century, not
just '00'.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
datetime.c (r1.200 -> r1.201)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/datetime.c?r1=1.200&r2=1.201)