[cmake-developers] [CMake 0015749]: Make the URL option of ExternalProject_Add to accept lists

[Schmertmann, Lars]

Hello there,

I try to continue the work from André.
With the attached patch it is possible to use a list of URLs
but it is still limited to a single path.

I think for a mix of pathes/URLs we need to move a lot of code
from ExternalProject.cmake into ExternalProject-download.cmake.
Maybe it is good to realize this in a new ticket/commit?

Best regards
    Lars Schmertmann

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