                                  _   _ ____  _     
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                             / __| | | | |_) | |    
                            | (__| |_| |  _ <| |___ 
                             \___|\___/|_| \_\_____|

Include files for libcurl, external users.

They're all placed in the curl subdirectory here for better fit in any kind
of environment. You should include files from here using...

        #include <curl/curl.h>

... style and point the compiler's include path to the directory holding the
curl subdirectory. It makes it more likely to survive future modifications.