Boost_USE_STATIC_LIBS deviates from FindBoost.cmake behaviour

In the Find module, Boost_USE_STATIC_LIBS=OFF means that it is allowed to find either a dynamic version of boost **or** a static version.

With your config file, Boost_USE_STATIC_LIBS=OFF forces shared-only.

a) Why the deviation? This makes consistent CMake scripts very difficult if one wants to support older boosts without the config.
~~b) Why those arbitrary choices for the value OFF? Shouldn't the consumer decide?! How would one even choose shared/dynamic boost on Windows with this?~~ Edit: corrected

While this is considered, can you recommend a quick fix on how to use this config to find either shared or static? After all, many builds are agnostic to how boost was linked.