Update Akismet external to 2.5.9.



git-svn-id: https://core.svn.wordpress.org/branches/3.6@24968 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove ultimately unnecessary visibility keyword from a WP_Locale method because this file is included when we bail for PHP 4. props ocean90. fixes #24915.



git-svn-id: https://core.svn.wordpress.org/branches/3.6@24970 1a063a9b-81f0-0310-95a4-ce76da25c4cd