Log Message:-----------Fix CREATE TRIGGER release mention, WHERE -> WHEN.
Modified Files:-------------- pgsql/doc/src/sgml: release-9.0.sgml (r2.25 -> r2.26) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-9.0.sgml?r1=2.25&r2=2.26)
