[ericcurtin]

Summary

Adds allow-encoded-slash to the policy update --add-endpoint options, so the fix the %2F denial recommends can be applied incrementally.

Related Issue

Closes #4926

Changes

• Parse allow-encoded-slash (needs a rest or websocket endpoint).
• Merge the two protocol check helpers into one.
• Update the option list in the help text, the error message, and the network rules docs.

Release Notes

openshell policy update --add-endpoint now accepts the allow-encoded-slash option.

Testing

• Checks appropriate to the affected code and behavior pass (cargo fmt --check, cargo clippy -p openshell-cli --tests, cargo test -p openshell-cli --lib policy_update)
• Unit tests added/updated (if applicable)
• E2E tests added/updated (if applicable)

Checklist

• Follows Conventional Commits
• Commits are signed off (DCO)
• Architecture docs updated (if applicable)

[ericcurtin]

@TaylorMutch @SDAChess could you please triage #4926 so the issue check can pass? PTAL, and /ok to test 2f4ffa6e088f5c76edddc7ca153947246186bc99 if it looks good. Thank you!

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