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FindCURL
Find curl
Find the native CURL headers and libraries.
CURL_INCLUDE_DIRS   - where to find curl/curl.h, etc.
CURL_LIBRARIES      - List of libraries when using curl.
CURL_FOUND          - True if curl found.
CURL_VERSION_STRING - the version of curl found (since CMake 2.8.8)
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Licensed under the BSD 3-clause License.
 https://cmake.org/cmake/help/v3.7/module/FindCURL.html