home: hub: mkinitfs

ref: 36da40325a76cfd7c10ed280e38d726232b86de1
dir: /.travis/keys/

alpine-devel@lists.alpinelinux.org-4a6a0840.rsa.pub
alpine-devel@lists.alpinelinux.org-4d07755e.rsa.pub
alpine-devel@lists.alpinelinux.org-5243ef4b.rsa.pub
alpine-devel@lists.alpinelinux.org-524d27bb.rsa.pub
alpine-devel@lists.alpinelinux.org-5261cecb.rsa.pub