[PATCH RESEND v3 07/10] block: Support detached LUKS header creation using qemu-img

Add the 'detached-mode' option to specify the creation of a detached LUKS header. This is how it is used: $ qemu-img create --object secret,id=sec0,data=abc123 -f luks > -o cipher-alg=aes-256,cipher-mode=xts -o key-secret=sec0 > -o detached-mode=true header.luks Signed-off-by: Hyman Huang --- bl

[v3 07/10] block: Support detached LUKS header creation using qemu-img

Add the 'detached-mode' option to specify the creation of a detached LUKS header. This is how it is used: $ qemu-img create --object secret,id=sec0,data=abc123 -f luks > -o cipher-alg=aes-256,cipher-mode=xts -o key-secret=sec0 > -o detached-mode=true header.luks Signed-off-by: Hyman Huang --- bl