Bug#690246: debian-installer: initial install reboot failure to find lvm devices when hostname has a - in it

["David H. Gutteridge" <dhgutteridge@sympatico.ca>]

I recently used the Stretch RC 3 installer to install an LVM setup
where the hostname contains a hyphen, and I did not encounter this
issue, so perhaps it's been fixed in the intervening years?

Regards,

Dave