// registers. Therefore we extend type_with_alignment<> to support
// such types, however, we have to be careful to use a builtin type
// whenever possible otherwise we break previously working code:
-// see http://article.gmane.org/gmane.comp.lib.boost.devel/173011
+// see https://lists.boost.org/Archives/boost/2014/03/212391.php
// for an example and test case. Thus types like a8 below will
// be used *only* if the existing implementation can't provide a type
// with suitable alignment. This does mean however, that type_with_alignment<>