Log Message:
-----------
Update documentation on GRANT SCEMA USAGE, again.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
grant.sgml (r1.58 -> r1.59)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/grant.sgml.diff?r1=1.58&r2=1.59)