Make the cpuacct_cgroup collector honour the path option and remove the CPUACCT_PATH constant
Removed the unused 'xenfix' option
Added is True conditional to sort_by_uuid option check
Added help text
Added help text
Merge pull request #604 from stuartbfox/master

add "is True" conditional to libvirt sort_by_uuid option, general cpuacct_cgroup cleanup