Ticket #15916: 15916.patch

wp-includes/functions.php

@@ -2493 +2493 @@
                 'txt|asc|c|cc|h' => 'text/plain',
                 'csv' => 'text/csv',
                 'tsv' => 'text/tab-separated-values',
+                'ics' => 'text/calendar',
                 'rtx' => 'text/richtext',
                 'css' => 'text/css',
                 'htm|html' => 'text/html',