is_project_quota_supported() is called from sanity-quota.sh to verify if the ldiskfs FS $ENABLE_PROJECT_QUOTAS is true and to verify if current version of lfs command supports 'project'.  To do this it calls 'lfs --help' which is unfortunately not supported. (note lfs does not support 'dash-dash').  The closest lfs call for this is --list-commands. To verfiy if the present version of lfs supports 'project'