FindBoost: Add support for Boost 1.65.0 and 1.65.1 to CMake 3.9
Backport the changes from !1172 (merged) and !1241 (merged) to CMake 3.9.
Fixes: #17289 (closed)
Backport the changes from !1172 (merged) and !1241 (merged) to CMake 3.9.
Fixes: #17289 (closed)