State-reset and security mitigations.

Upgrade Ruma to present.

The following are intentionally benign for activation in a later commit:

- Hydra backports not default.
- Room version 12 not default.
- Room version 12 not listed as stable.

Do not enable them manually or you can brick your database.

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/matrix/pdu/redact.rs

@@ -10,7 +10,13 @@ pub fn redact(&mut self, room_version_id: &RoomVersionId, reason: JsonValue) ->
 	let mut content = serde_json::from_str(self.content.get())
 		.map_err(|e| err!(Request(BadJson("Failed to deserialize content into type: {e}"))))?;
 
-	redact_content_in_place(&mut content, room_version_id, self.kind.to_string())
+	let room_version_rules = room_version_id.rules().ok_or_else(|| {
+		err!(Request(UnsupportedRoomVersion(
+			"Cannot redact event for unknown room version {room_version_id:?}."
+		)))
+	})?;
+
+	redact_content_in_place(&mut content, &room_version_rules.redaction, self.kind.to_string())
 		.map_err(|e| Error::Redaction(self.sender.server_name().to_owned(), e))?;
 
 	let reason = serde_json::to_value(reason).expect("Failed to preserialize reason");