Add missing copyright headers

Autoported commit.
Original commit hash: [7b8cfea5e]
Manual files:
commons/src/main/java/com/itextpdf/commons/datastructures/ConcurrentHashSet.java

itext.tests/itext.commons.tests/itext/commons/datastructures/ConcurrentHashSetTest.cs

@@ -1,3 +1,25 @@
+/*
+This file is part of the iText (R) project.
+Copyright (c) 1998-2024 Apryse Group NV
+Authors: Apryse Software.
+
+This program is offered under a commercial and under the AGPL license.
+For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.
+
+AGPL licensing:
+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/>.
+*/
 using System;
 using System.Collections.Generic;
 using iText.Commons.Exceptions;

port-hash

@@ -1 +1 @@
-0a8638bed4421f046031ae84ecde685b3a8b34c1
+7b8cfea5e5d0c751a7e66d06e7da481e33868d68