feat: make iroh-relay server work without default crypto provider

[Frando]

Description

• Based on, and reverts, fix: set default crypto provider for iroh-relay binary #4087
• Depends on feat: allow to inject crypto provider into acceptor tokio-rustls-acme#42

This makes iroh-relay work without relying on a rustls default crypto provider being set. Always uses ring, but with this we could feature flag it ourselves, if we wanted to, without relying on global state.

Breaking Changes

Notes & open questions

Change checklist

• Self-review.
• Documentation updates following the style guide, if relevant.
• Tests if relevant.
• All breaking changes documented.
  • List all breaking changes in the above "Breaking Changes" section.
  • Open an issue or PR on any number0 repos that are affected by this breaking change. Give guidance on how the updates should be handled or do the actual updates themselves. The major ones are:
    • quic-rpc
    • iroh-gossip
    • iroh-blobs
    • dumbpipe
    • sendme

[github-actions]

Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh/pr/4089/docs/iroh/

Last updated: 2026-04-08T11:34:50Z

[github-actions]

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Last updated for commit: 070fbdf