Create an HTTPS certificates page

Description

Onionspray's HTTPS Certificates page is outdated, and something broader is needed.

Tasks

• Update Onionspray's HTTPS Certificates page to reflect the current practices:
  • Add a reference to Onionmine.
  • Add a reference to Onionsec (repository, UI repository).
  • Add a reference to the Certificate proposals page.
  • Add a note about certificates going to public CT Logs upon issuance.
  • Add a reference to BadSSL But Onion · Wiki · The Tor Project / Applications and to PieroV's Onion Tests.
  • Mention the need for Subjet Alt Names in the certificate. References:
    • https://lists.torproject.org/pipermail/tor-project/2024-September/003851.html
    • tpo/applications/tor-browser#42887 (closed)
    • https://gitlab.torproject.org/tpo/applications/team/-/wikis/Development-Information/BadSSL-But-Onion#how-to-generate-a-certificate
  • Improve the instructions to make test certificates.
• Move the non-Onionspray specific sections to a broader scope:
  • Maybe directly into the Ecosystem docs under the Checklist document or into a HOWTO/Guides section in the web docs.
• Add references to this new page into:
  • Onion Plan's certificate proposals page.
  • Onionmine docs (tutorial and usage pages).
  • Onionspray Ansible Role.

Time estimation

• Complexity: very small (0.5 day)
• Uncertainty: low (x1.1)
• Reference (adapted)