Bug#974206: debian-installer: When entering an IPv6 address, fe80::1 should be a valid gateway

[Harald Hannelius <harald@arcada.fi>]

Package: debian-installer
Version: Debian 10.6
Severity: normal

Dear Maintainer,

I needed to enter an IPv6-address in the installer. When entering
fe80::1 as a gateway the installer stops with an error that the
address isn't reachable. The address fe80::1 is indeed a valid
address for a gateway.


-- System Information:
Debian Release: 10.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-12-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled