add or update See www.boost.org comments

[SVN r16708]

include/boost/config.hpp

@@ -5,7 +5,7 @@
 //  in all copies. This software is provided "as is" without express or implied
 //  warranty, and with no claim as to its suitability for any purpose.
 
-//  See http://www.boost.org for most recent version.
+//  See http://www.boost.org/libs/config for most recent version.
 
 //  Boost config.hpp policy and rationale documentation has been moved to
 //  http://www.boost.org/libs/config

include/boost/limits.hpp

@@ -6,6 +6,8 @@
 //
 // use this header as a workaround for missing <limits>
 
+//  See http://www.boost.org/libs/utility/limits.html for documentation.
+
 #ifndef BOOST_LIMITS
 #define BOOST_LIMITS