metarefresh: Fix creation of output directory.
metarefresh: Fix creation of output directory.

Patch created by Thijs Kinkhorst <thijs@kinkhorst.com>.

Fixes issue 296.
tectronics/simplesamlphp,tectronics/simplesamlphp,vivekrajenderan/simplesamlphp,vivekrajenderan/simplesamlphp,tectronics/simplesamlphp,tectronics/simplesamlphp,tectronics/simplesamlphp,vivekrajenderan/simplesamlphp,vivekrajenderan/simplesamlphp,vivekrajenderan/simplesamlphp