Federated room joins (#2188)

src/matrix-utils.ts

@@ -189,6 +189,7 @@ export async function initClient(
   }
 
   await client.initCrypto();
+  client.setGlobalErrorOnUnknownDevices(false);
   await client.startClient();
   await waitForSync(client);
 

src/room/useLoadGroupCall.ts

@@ -82,10 +82,7 @@ export const useLoadGroupCall = (
           );
         }
       } else {
-        // room IDs we just try to join by their ID, which will not work in the
-        // general case without providing some servers to join via. We could provide
-        // our own server, but in practice that is implicit.
-        room = await client.joinRoom(roomIdOrAlias);
+        room = await client.joinRoom(roomIdOrAlias, { viaServers });
       }
 
       logger.info(