Log Message:
-----------
Update release notes for upcoming releases.
Modified Files:
--------------
pgsql/doc/src/sgml:
release.sgml (r1.427 -> r1.428)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release.sgml.diff?r1=1.427&r2=1.428)