3.8.4 Release. 
* Removed Wordfence .htaccess because it doesn't offer any security functionality and increases incompatibility.
* Fixed spelling errors.
* Added check to see if $_SERVER['HTTP_USER_AGENT'] is defined before using it to suppress large number of warnings on some sites.
* Changed the way we call admin_url() to the correct syntax.
* Correctly escaped HTML on error messages.
* Fixed issue that generated non-compliant query string.
* Updated GeoIP database to newest version.



git-svn-id: https://plugins.svn.wordpress.org/wordfence/trunk@780398 b8457f37-d9ea-0310-8a92-e5e31aec5664