Update zimbra_backup.sh

zimbra_backup.sh

@@ -1,4 +1,18 @@
 #!/bin/bash
+# 
+# Copyright (C) 2025 LINUXexpert.org
+# 
+# This program 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, version 3 of the License.
+# 
+# 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 General Public License 
+# for more details.
+# 
+# You should have received a copy of the GNU General Public License along 
+# with this program. If not, see <https://www.gnu.org/licenses/>.
 
 # Ensure script is run as root or sudo
 if [ "$EUID" -ne 0 ]; then