feat: Backend reports default permissions.

When any of the backend is used 'anonymous', 'jitsi-anonymous', 'internal_hashed', 'internal_plain', 'cyrus' and a participant becomes a moderator, because of external module or because set from jicofo we send to client with the self-presence about becoming moderator a default set of permissions which can be controlled via prosody config.
If using 'token' authentication the above applies only if there is a token and the token does not contain context.features.

react/features/chat/middleware.ts

@@ -256,6 +256,7 @@ MiddlewareRegistry.register(store => next => action => {
                 lobbyChat: false
             }, false, true);
         }
+        break;
     }
     }