Log Message:
-----------
Restore pl/pgsql default install release note item.
Modified Files:
--------------
pgsql/doc/src/sgml:
release-9.0.sgml (r2.41 -> r2.42)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-9.0.sgml?r1=2.41&r2=2.42)