See #1841 for details.

Tasks

After we merge #2796 and #2808, we need to:

• Deploy a new DNS seeder instance for NU5 testnet (170014), but don't switch the Foundation's DNS records yet
  • failed deployment https://github.com/ZcashFoundation/coredns-zcash/actions/runs/1267893660
  • fix PRs:
    • Create a dependabot.yml to update GitHub actions coredns-zcash#9
    • Use google-github-actions/setup-gcloud coredns-zcash#10
  • successful deployment: https://github.com/ZcashFoundation/coredns-zcash/runs/3703970205
• Deploy a new DNS seeder instance for NU5 testnet (170015), but don't switch the Foundation's DNS records yet
  • Change the max network protocol version in the DNS seeder to 170_015 for NU5 testnet #2808
  • Set network protocol version to NU5 testnet (second activation) dnsseeder#13
  • https://github.com/ZcashFoundation/coredns-zcash/actions/runs/1288695743
• Check that the testnet seeder is returning new peers
• Check that the mainnet seeder continues to return current peers
• Switch the Foundation's DNS records to point to the new instance