kernel: Add behaviour to define callbacks for via registries

[TheFirstAvenger]

This new behaviour defines the three callbacks required for custom registries (i.e. {via, Module, Name}).

If accepted, and once added to bootstrap, a second PR will be added to add this behaviour to global.

[CLAassistant]

All committers have signed the CLA.

[sirihansen]

I'm sorry for the delayed handling of this PR, and unfortunately I still have no answer. We need to discuss the way forward for behaviours in general before we can decide anything on this.

Thanks for you contribution!

[TheFirstAvenger]

@sirihansen thanks for the update! Is/Will this conversation be public. If so, where?

[sirihansen]

At least as a start it will be an internal discussion, but we might involve the community at a later stage. If so, it will probably be on the erlang-questions mailing list.

[github-actions]

CT Test Results

Tests are running... https://github.com/erlang/otp/actions/runs/6500041326

Results for commit c251c30

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// Erlang/OTP Github Action Bot

[TheFirstAvenger]

@sirihansen Any update on this PR? It's the 5 year anniversary of it being submitted 🎉.