Update spans MU-versions for the following security releases from upstream:

http://wordpress.org/development/2009/08/2-8-4-security-release/ http://wordpress.org/development/2009/08/wordpress-2-8-3-security-release/

• Backport of XSS fixes from WordPress 2.8.2

• Backport of security fixes for admin.php?page= bugs (CVE-2009-2334) Backport of security fixes for admin.php?page= bugs (CVE-2009-2334) Backport of security fixes for admin.php?page= bugs (CVE-2009-2334)