Removed Megavideo and MegaUpload modules. These sites no longer exist. Also removed the FileServer checker - this site no longer supports file sharing and the API is private. All old links return 404.

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@895925 b8457f37-d9ea-0310-8a92-e5e31aec5664