man curl_global_cleanup (Fonctions bibliothèques) - global libcurl cleanup
NAME
curl_global_cleanup - global libcurl cleanup
SYNOPSIS
#include <curl/curl.h> void curl_global_cleanup(void);
DESCRIPTION
curl_global_cleanup must be called once (no matter how many threads or libcurl sessions that'll be used) by every application that uses libcurl, after all uses of libcurl is complete.
This is the opposite of curl_global_init(3).
Not calling this function may result in memory leaks.