[FIX] IE Pragma:nocache bug for HTTPS downloads
[FIX] IE Pragma:nocache bug for HTTPS downloads

 * Fixes #569

OmeGak/indico,mvidalgarcia/indico,OmeGak/indico,mvidalgarcia/indico,indico/indico,mic4ael/indico,ThiefMaster/indico,indico/indico,DirkHoffmann/indico,indico/indico,indico/indico,pferreir/indico,DirkHoffmann/indico,mvidalgarcia/indico,OmeGak/indico,ThiefMaster/indico,pferreir/indico,mic4ael/indico,mic4ael/indico,ThiefMaster/indico,OmeGak/indico,mic4ael/indico,DirkHoffmann/indico,ThiefMaster/indico,DirkHoffmann/indico,pferreir/indico,pferreir/indico,mvidalgarcia/indico