Added missing copyright declarations.

[SVN r23723]

example/snippets/captures_example.cpp

@@ -1,3 +1,13 @@
+/*
+ *
+ * Copyright (c) 2004
+ * Dr John Maddock
+ *
+ * Use, modification and distribution are subject to the
+ * Boost Software License, Version 1.0. (See accompanying file
+ * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ *
+ */
 
 #include <boost/regex.hpp>
 #include <iostream>