This command fails currently:
wget http://www.cmake.org/files/v3.3/cmake-3.3.1-Linux-x86_64.sh
Obviously cmake.org now redirects to https connections, so we have to
fix the URL. Then there still remains a certificate problem. Adding
--no-check-certificate is a workaround which should be removed later.
Signed-off-by: Stefan Weil <sw@weilnetz.de>