bittornado is unmaintained upstream since december 2006 (more that 7 years) so there's no security patches coming from its developers and no listed CVEs.
debian applies 30 patches (more or less), most of which aren't security related at all.
if you prefer to use it with their patches, just launch this slightly modified build script that uses them: as root
Code:
lftp -c mirror http://ponce.cc/slackware/testing/bittornado/
cd bittornado
BUILD=4custom ./bittornado.SlackBuild
upgradepkg --install-new --reinstall ../bittornado-0.3.18-noarch-4custom.txz
