Shared variables (and fw_ext_interfaces / fw_local_interfaces) can now be
overridden for IPv6 via <name>_v6. extract-fw-host-vars.py emits these
overrides when the IPv4 and IPv6 configs differ, instead of a warning.
Add host_vars for nd.warenform.de, oolm-shop.oopen.de, web-01.oopen.de
and web0.warenform.de (fw_manage_config: true).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
