PRIVATE: added hoc copyright

engines/private/code.cpp

@@ -20,6 +20,29 @@
  *
  */
 
+// Heavily inspired by hoc
+// Copyright (C) AT&T 1995
+// All Rights Reserved
+//
+// Permission to use, copy, modify, and distribute this software and
+// its documentation for any purpose and without fee is hereby
+// granted, provided that the above copyright notice appear in all
+// copies and that both that the copyright notice and this
+// permission notice and warranty disclaimer appear in supporting
+// documentation, and that the name of AT&T or any of its entities
+// not be used in advertising or publicity pertaining to
+// distribution of the software without specific, written prior
+// permission.
+//
+// AT&T DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+// INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
+// IN NO EVENT SHALL AT&T OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
+// SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+// IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+// ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+// THIS SOFTWARE.
+
 #include "common/str.h"
 #include "common/debug.h"
 #include "common/hash-ptr.h"