Bug#1018894: rescue-mode: mounts wrong btrfs subvolume

[Pascal Hambourg <pascal@plouf.fr.eu.org>]

On 05/09/2022 at 10:46, Ansgar wrote:
> On Sat, 2022-09-03 at 21:06 -0400, Nicholas D Steeves wrote:
>
> >    grep 'ID\=debian' < /etc/os-release
>
> It should also test for `/usr/lib/os-release` in case the symlink in
> `/etc/` is not present.

Neither will work with separate /usr.