Flag v2 rooms as "safe"
Flag v2 rooms as "safe"

We'll still need something like https://github.com/matrix-org/matrix-doc/pull/1804 to make this work correctly, but this fixes the immediate issue in https://github.com/vector-im/riot-web/issues/8154
krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk