Log Message:-----------Add rtee box index discussion.
Added Files:----------- pgsql/doc/TODO.detail: rtree (r1.1) (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.detail/rtree?rev=1.1&content-type=text/x-cvsweb-markup)