Co-Authored-By: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Reference implementations: * 94f664e725 * https://github.com/matrix-org/matrix-react-sdk/pull/2461 * https://github.com/matrix-org/matrix-js-sdk/pull/818 * https://github.com/matrix-org/matrix-react-sdk/pull/2596 * https://github.com/matrix-org/matrix-js-sdk/pull/837 Proposals: * [MSC1717](https://github.com/matrix-org/matrix-doc/pull/1717) * [MSC1267](https://github.com/matrix-org/matrix-doc/issues/1267) No alterations to either proposal have been made intentionally here.
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