Fix ICE username/password validation

[mikhail-barg]

This change fixes username and password validation. Old regexes are only checking for lowercase letters, so even the default values generated by random_string() are not being validated. This became apparent while attempting to fix this issue in aiortc.

[lgrahl]

Good catch. Any objections @fippo?

[lgrahl]

Supplement: Can you add a test for this, @mikhail-barg?

[fippo]

Adjusting the set_local_username_and_password to have an uppercase letter should be sufficient as test.

Now how do we get MacOS to work with mdns ...

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (e5b41cb) to head (1bfd51b).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #103   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines         1236      1236           
=========================================
  Hits          1236      1236           

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[mikhail-barg]

@lgrahl @fippo I've updated the set_local_username_and_password test, but I'm not sure what to do regarding mDNS test

[fippo]

I think this is hitting a totally unrelated issue (actions/runner-images#10924). Let me look into how to disable MDNS tests on github actions ...

[fippo]

#104 should make this pass hopefully with no more action required 🤞

[fippo]

Looks like the CI doesn't rebase automatically, could you do it locally please?

[mikhail-barg]

I've synced my repo (PR source) via github interface, so the PR is updated

[fippo]

(ready to merge but we are still pondering whether to pin the Mac CI to an older version)