The `find_package_handle_standard_args(FOUND_VAR)` is deprecated as of
CMake 3.3 and both the `<PackageName>_FOUND` and the upper-cased
`<PACKAGE_NAME>_FOUND` are set with or without using this option.
Additionally, find modules and docs are also synced with this to make it
clearer.
Cygwin-built CMake now converts paths from Cygwin to Windows form
(using cygpath -w) before they're passed to WiX.
The Wix generator on Cygwin requires the libuuid-dev package when
building CMake. However, the DLL it links to is installed by default
as part of Cygwin's core libs, so it does not need to be distributed.
If libuuid-dev isn't available, CMake is simply built without Wix
support on Cygwin.
