tails 2026 merge
Tails retirements, merges and migrations for 2024 from [TPA-RFC-73](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap).
Excerpt of the timeline:
> * Basic system functionality:
> * [Authentication](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap#authentication) (merge)
> * [Backups](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap#backups) (migrate) (NOTE: POSTPONED TO 2027)
> * [DNS](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap#dns) (migrate)
> * [Firewall](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap#firewall) (migrate)
> * [TLS](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap#tls) (migrate)
> * [Web servers](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap#web-servers) (merge)
> * [Mailman](https://gitlab.torproject.org/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap#mailman) (merge)
previous year: %"TPA-RFC-73: Tails merge (2025)"
epic