file download issues related to TLS

[G4m4]

Hi!

On multiple repos relying on CPM for their dependencies I sometimes (on Windows computers only) struggle to download the content of the file CPM.cmake

The main symptom is this typical error during the configure step: Unknown CMake command "CPMAddPackage"

But it actually comes from the fact that the downloading of the file as done in get_cpm.cmake failed.
When retrieving the status of

  file(
    DOWNLOAD
    https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
    ${CPM_DOWNLOAD_LOCATION}
    EXPECTED_HASH SHA256=${CPM_HASH_SUM}
    STATUS DOWNLOAD_STATUS
  )

${DOWNLOAD_STATUS} will contain 35;"SSL connect error"

Although I have not investigating the root cause for the TLS issue as on WIndows it might become tricky.