Redirect error 400 (http request to https port) to https (#5948)

Author: Thom

install/tpl/apache_ispconfig.vhost.master

@@ -112,4 +112,8 @@ NameVirtualHost *:<tmpl_var name="vhost_port">
   <tmpl_var name="ssl_comment">SSLStaplingResponderTimeout 5
   <tmpl_var name="ssl_comment">SSLStaplingReturnResponderErrors Off
   </tmpl_if>
+
+  # Redirect http to https
+  ErrorDocument 400 "<script>document.location.href='https://'+location.hostname+':'+location.port';</script><h1>Error 400 - trying to redirect</h1>"
+
 </VirtualHost>