MGASA-2016-0269 Updated libidn packages fix security vulnerability

Out-of-bounds stack read in libidn before 1.33 in idnatoascii4i CVE-2016-6261. Out-of-bounds-read in libidn when reading one zero byte as input CVE-2015-8948, CVE-2016-6262. In libidn before 1.33, stringpreputf8nfkcnormalize would crash when presented with invalid UTF-8 CVE-2016-6263...