Revert all changes since the last merge point.

This is a 'git merge -s ours', to revert the old changes in one go.
Correct broken links to C++ standard papers. Refs #9212.

[SVN r86524]
Remove old directory accidentally restored by git conversion.

The git conversion recreated some very old files, I think it was
confused by the old conversions from CVS to subversion. This deletes
them, you can see that this directory doesn't exist at:

https://svn.boost.org/svn/boost/trunk/libs/iterator/