bugfix: ssl cert path was force lower cased
bugfix: ssl cert path was force lower cased

thanks to John Niendorf reporting this bug

sdx23/khal,sheeprine/khal,sithglan/khal,hobarrera/khal,dzoep/khal,geier/khal,sithglan/khal,pimutils/khal,sheeprine/khal,pdav/khal