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webauthn-rs-core/webauthn-authenticator-rs: Origin validation mismatch possible when subdomains are allowed
### Summary `webauthn-rs-core` ([Relying Party][rp]) and `webauthn-authenticator-rs` ([client][]) checked that [an `Origin` in `CollectedClientData`][origin] is valid for [an RP ID][rpid] with [`str::ends_with()`][ends-with], [without checking for a dot (`.`)…