sudoers: Treat 256 exit codes as errors
sudoers: Treat 256 exit codes as errors

I ran into an issue locally where I didnt have lxc installed and some
commands were giving me back some false positives. Weird but this fixes
the problem I was facing.

mayflower/vagrant-lxc,danielhodder/vagrant-lxc,spheresh/vagrant-lxc,Val/vagrant-lxc,necrose99/vagrant-lxc,spheresh/vagrant-lxc,kevinlowrie/vagrant-lxc,globin/vagrant-lxc,ccope/vagrant-lxc,globin/vagrant-lxc,Val/vagrant-lxc,fgrehm/vagrant-lxc,Val/vagrant-lxc,necrose99/vagrant-lxc,fgrehm/vagrant-lxc,globin/vagrant-lxc,necrose99/vagrant-lxc,spheresh/vagrant-lxc,mayflower/vagrant-lxc,kevinlowrie/vagrant-lxc,kevinlowrie/vagrant-lxc,fgrehm/vagrant-lxc,ccope/vagrant-lxc,danielhodder/vagrant-lxc,danielhodder/vagrant-lxc,mayflower/vagrant-lxc,ccope/vagrant-lxc