Log Message:
-----------
Update EXPLAIN wording for GEQO usage.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
explain.sgml (r1.35 -> r1.36)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/explain.sgml.diff?r1=1.35&r2=1.36)