Log Message:-----------Update key words table to 8.4 and SQL:2008.
Modified Files:-------------- pgsql/doc/src/sgml: keywords.sgml (r2.20 -> r2.21) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/keywords.sgml?r1=2.20&r2=2.21)
