Package: libapache2-mod-qos

"libapache2-mod-qos" package binaries on Debian:

/usr/bin/qsexec /usr/bin/qsfilter2 /usr/bin/qsgrep /usr/bin/qslog /usr/bin/qslogger /usr/bin/qspng /usr/bin/qsrotate /usr/bin/qssign /usr/bin/qstail

You may install this package on Debian with apt-get install libapache2-mod-qos