cmake-packages documentation suggests to install CMake config files in a directory that is not found automatically in Windows

The cmake-packages documentation suggests to install CMake config files to lib/cmake/<package_name> [1], however that path is not searched for by find_package on Windows when the package is installed in the default CMAKE_INSTALL_PREFIX [3] .

A more multi-platform alternative to suggest would be:

if(WIN32 AND NOT CYGWIN)
     set(ConfigPackageLocation CMake)
else()
     set(ConfigPackageLocation lib/cmake/ClimbingStats)
endif()

This is a common pitfall for libraries developed on *nix system to work correctly out of the box in Windows [3][4][5], so fixing it in the main CMake documentation would be highly beneficial.

[1] : https://gitlab.kitware.com/cmake/cmake/blame/v3.6.1/Help/manual/cmake-packages.7.rst#L327

[2] : https://cmake.org/cmake/help/v3.6/command/find_package.html#command:find_package

[3] : https://github.com/flexible-collision-library/fcl/pull/116#discussion_r58436663

[4] : https://bitbucket.org/ignitionrobotics/ign-math/pull-requests/63/fix-logic-of-installation-of-cmake/diff

[5] : https://bitbucket.org/ignitionrobotics/ign-math/pull-requests/63/fix-logic-of-installation-of-cmake/diff