This mod adds the par2cmdline-turbo fork as a replacement for the standard par2cmdline package.
In the SABnzbd docker arguments, set an environment variable DOCKER_MODS=linuxserver/mods:sabnzbd-par2cmdline-turbo
If adding multiple mods, enter them in an array separated by |, such as DOCKER_MODS=linuxserver/mods:sabnzbd-par2cmdline-turbo|linuxserver/mods:openssh-server-mod2