[Boost-users] Is boost::to_upper() still a part of Boost?

Is boost::to_upper() still a part of Boost? I did a grep on the Boost includes today and did not find to_upper. Has it been renamed or deprecated? boost.org does list to_upper() in its online docs (boost.org Home > Documentation > Nightly CVS), but I can't find it in the online docs for the current release or the (offline) documentation that comes with Boost.