[4009] Updated asiolink.h

src/lib/asiolink/asiolink.h

@@ -1,4 +1,4 @@
-// Copyright (C) 2010  Internet Systems Consortium, Inc. ("ISC")
+// Copyright (C) 2010, 2015  Internet Systems Consortium, Inc. ("ISC")
 //
 // Permission to use, copy, modify, and/or distribute this software for any
 // purpose with or without fee is hereby granted, provided that the above
@@ -33,7 +33,7 @@
 /// The \c asiolink namespace is used to define a set of wrapper interfaces
 /// for the ASIO library.
 ///
-/// Kea uses the non-Boost version of ASIO because it's header-only,
+/// Kea uses the Boost version of ASIO in its header-only mode,
 /// i.e., does not require a separate library object to be linked, and thus
 /// lowers the bar for introduction.
 ///