[faiproject/fai] 09e913: make sure hostname is set and we have eth0

[Mrfai]

  Branch: refs/heads/master
  Home:   https://github.com/faiproject/fai
  Commit: 09e913f4fa4b107c5e8ea88a09acf1e0b9f31f7a
      https://github.com/faiproject/fai/commit/09e913f4fa4b107c5e8ea88a09acf1e0b9f31f7a
  Author: Thomas Lange <lange at debian.org>
  Date:   2024-01-04 (Thu, 04 Jan 2024)

  Changed paths:
    M conf/grub.cfg

  Log Message:
  -----------
  make sure hostname is set and we have eth0