feat: Do not require IP in DHCP mode (#886)

  fi

  GATEWAY=$(ip route list dev "$VM_NET_DEV" | awk ' /^default/ {print $3}' | head -n 1)

  IP=$(ip address show dev "$VM_NET_DEV" | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/ | head -n 1)

  IP6=""

  { IP=$(ip address show dev "$VM_NET_DEV" | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/ | head -n 1); rc=$?; } 2>/dev/null || :

  if (( rc != 0 )) && [[ "$DHCP" != [Yy1]* ]]; then

    error "Could not determine container IP address!" && exit 26

  fi

  IP6=""

  # shellcheck disable=SC2143

  if [ -f /proc/net/if_inet6 ] && [ -n "$(ifconfig -a | grep inet6)" ]; then

    IP6=$(ip -6 addr show dev "$VM_NET_DEV" scope global up)

    { IP6=$(ip -6 addr show dev "$VM_NET_DEV" scope global up); rc=$?; } 2>/dev/null || :

    (( rc != 0 )) && IP6=""

    [ -n "$IP6" ] && IP6=$(echo "$IP6" | sed -e's/^.*inet6 \([^ ]*\)\/.*$/\1/;t;d' | head -n 1)

  fi