ref: 03eeebb97f014c29a4dd25d873fc6ad50da48f15
dir: /sys/lib/sysconfig/proto/9bootproto/
uid=sys gid=sys 386 d775 9bootfat 664 9boothyb 664 9bootiso 664 9bootpxe 664 efiboot.fat 664 bootia32.efi 664 bootx64.efi 664 mbr 664 pbs 664 cfg d775 plan9.ini 664