Fix STATEPATH/PIDPATH/ALTPIDPATH directory creation and ownership
    
    use piddir for specifying restart_flag location
    use piddir for specifying configure --with-statepath/pidpath/altpidpath
    add nut-2.8.0-piddir-owner.patch for upstream tmpfiles config creation to not append /nut and always use owner root
    update nut-2.6.3-tmpfiles.patch to use correct tmpfiles config file name
    remove unused downstream tmpfiles source and code