Log Message:
-----------
Remove claim that this chapter discusses rules and triggers.
per Bruno Guimares Carneiro
Modified Files:
--------------
pgsql/doc/src/sgml:
dml.sgml (r1.20 -> r1.21)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/dml.sgml?r1=1.20&r2=1.21)