Add license info at Friendica classes

src/Content/Smilies.php

@@ -1,17 +1,24 @@
 <?php
-
 /**
- * @file src/Content/Smilies.php
- * This file contains the Smilies class which contains functions to handle smiles
+ * @copyright Copyright (C) 2020, Friendica
  *
- * @todo Use the shortcodes from here:
- * https://github.com/iamcal/emoji-data/blob/master/emoji_pretty.json?raw=true
- * https://raw.githubusercontent.com/emojione/emojione/master/extras/alpha-codes/eac.json?raw=true
- * https://github.com/johannhof/emoji-helper/blob/master/data/emoji.json?raw=true
+ * @license GNU AGPL version 3 or any later version
+ *
+ * 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 <https://www.gnu.org/licenses/>.
  *
- * Have also a look here:
- * https://www.webpagefx.com/tools/emoji-cheat-sheet/
  */
+
 namespace Friendica\Content;
 
 use Friendica\Core\Hook;