Download http://www.gnu.org/licenses/lgpl.txt and place it as
Licenses/LGPLv3.txt in our source tree. When building cmake-gui, use
option CMake_GUI_DISTRIBUTE_WITH_Qt_LGPL to enable notification in the
"About" dialog of how the distribution of Qt is licensed. Install the
license file as ${CMAKE_ROOT}/Licenses/LGPLv3.txt so that the dialog can
display a path to it.
LibArchive now defines this explicitly if it is not defined already.
Since we define _WIN32_WINNT explicitly, we must now define a consistent
value of NTDDI_VERSION explicitly too.
This test fails spuriously too often and prevents the nightly binary
from finishing. Simply skip it for the nightly binary to allow it
to complete more regularly.