Support for announcement-only groups

protos/SubProtocol.proto

@@ -1,19 +1,6 @@
-/**
- * Copyright (C) 2014 Open WhisperSystems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
+// Copyright 2014-2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
 package signalservice;
 
 option java_package = "org.whispersystems.websocket.messages.protobuf";