[boost] Patch in Ticket #9212 (Broken links to C++ standard papers)

Jonathan Wakely pointed out "Broken links to C++ standard papers" issue and attached a patch in #9212. ( https://svn.boost.org/trac/boost/ticket/9212 ) Though this patch is a large Boost-wide patch, it's very simple so I think someone can commit it to every library at once. Regards, Michel