The rework of the backup file detection logic missed the non-standard
file name case. This patch allows to restore backups with different file
names. Though the config extraction fails, since the type is unknown.
Signed-off-by: Alwin Antreich <a.antreich@proxmox.com>
detection into separate functions so they are reusable and easier
modifiable. This patch also adds the test for archive_info.
Signed-off-by: Alwin Antreich <a.antreich@proxmox.com>
