matrix-spec-proposals

bbbb5df2 - Remove C-S `unsigned` data from PDU definitions

Remove C-S `unsigned` data from PDU definitions Remove a bunch of fields from the `unsigned` property of PDUs. These things shouldn't be passed over the Federation API, and they *really* shouldn't be trusted if they are sent by another server. * `replaces_state` *is* returned by Synapse, but probably shouldn't be. * `redacted_because`, `prev_sender` and `prev_content` are not sent by Synapse.