fix to installation script to overpass sourceforge certificates
fix to installation script to overpass sourceforge certificates

tomkralidis/pycsw,kevinpdavies/pycsw,ingenieroariel/pycsw,rouault/pycsw,benhowell/pycsw,benhowell/pycsw,PublicaMundi/pycsw,mwengren/pycsw,mwengren/pycsw,geopython/pycsw,tomkralidis/pycsw,bukun/pycsw,kalxas/pycsw,PublicaMundi/pycsw,geopython/pycsw,bukun/pycsw,ckan-fcd/pycsw-fcd,geopython/pycsw,kalxas/pycsw,ocefpaf/pycsw,ckan-fcd/pycsw-fcd,ricardogsilva/pycsw,ocefpaf/pycsw,ricardogsilva/pycsw,bukun/pycsw,kalxas/pycsw,ricardogsilva/pycsw,tomkralidis/pycsw,rouault/pycsw,kevinpdavies/pycsw,ingenieroariel/pycsw