add copyright header

navigator/src/functions/streamProcDownload.js

@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2022 Josh Boudreau <jboudreau@45drives.com>
+ * 
+ * This file is part of Cockpit Navigator.
+ * 
+ * Cockpit Navigator is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ * 
+ * Cockpit Navigator 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along with Cockpit Navigator.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
 export function streamProcDownload(argv, filename, opts = {}) {
 	const query = window.btoa(JSON.stringify({
 		payload: 'stream',