Remove application/x-tar file extension test as it might not exist in nginx...

Aleksander Machniak

2016-05-20 9e64dc2debfa1c7410f82bf71f4d10856751e258

 program/include/rcmail_install.php

@@ -527,7 +527,7 @@
        $errors = array();
        $types  = array(
            'application/zip'   => 'zip',
            'application/x-tar' => 'tar',
            'text/css'          => 'css',
            'application/pdf'   => 'pdf',
            'image/gif'         => 'gif',
            'image/svg+xml'     => 'svg',