message: [vcpkg] http_proxy and https_proxy should be lowercase
  Pacman of Msys understands only lowercase environment variables
  http_proxy and https_proxy.
diff: @@ -175,8 +175,8 @@ namespace vcpkg::System
  L"USERPROFILE",
  L"windir",
  // Enables proxy information to be passed to Curl, the underlying download library in cmake.exe
  - L"HTTP_PROXY",
  - L"HTTPS_PROXY",
  + L"http_proxy",
  + L"https_proxy",
  // Enables find_package(CUDA) in CMake
  L"CUDA_PATH",
  // Environmental variable generated automatically by CUDA after installation
  