Update libinjection_adapter.h

Author: Easton97-Jens

src/operators/libinjection_adapter.h

@@ -1,5 +1,16 @@
 /*
  * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 - 2021 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
  */
 
 #ifndef SRC_OPERATORS_LIBINJECTION_ADAPTER_H_