In documentation, the link of new version notification should actually point to the new version

Google often returns links to outdated versions of the boost documentation. When opening a page, there appears a banner hinting to a new version of the documentation. However, this link is sometimes pointing to the start page, instead of the new version. For example:

Google returned: https://www.boost.org/doc/libs/1_46_1/libs/math/doc/sf_and_dist/html/math_toolkit/dist/dist_ref/dists/binomial_dist.html

The notification points to: https://www.boost.org/doc/libs/

It should point to: https://www.boost.org/doc/libs/1_70_0/libs/math/doc/html/math_toolkit/dist_ref/dists/binomial_dist.html

It would be even better to have a drop-down menu that allows to select the boost version one is using. I think, [CMake does this really well](https://cmake.org/cmake/help/latest/index.html) (upper left corner): Besides all the explicit versions, it also provides a selection for upcoming and latest version of the docs.