GUACAMOLE-2139: Add automatic retrieval of license information where absent. Remove unused license info.

doc/licenses/apache-directory-api/NOTICE

@@ -2,11 +2,12 @@
 # URL:     http://directory.apache.org
 # From:    'Apache Software Foundation' (https://www.apache.org/)
 # License: Apache v2.0
+# Source:  https://raw.githubusercontent.com/apache/directory-ldap-api/refs/tags/${VERSION}/NOTICE
 #
-# --- BEGIN LICENSE FILE ---
+# --- BEGIN LICENSE FILE [2.1.7] ---
 Apache Directory LDAP API
-Copyright 2003-2023 The Apache Software Foundation
+Copyright 2003-2024 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (https://www.apache.org/).
-# --- END LICENSE FILE ---
+# --- END LICENSE FILE [2.1.7] ---