Fix broken links to online gdb help.

tests/hellocurl/hellocurl.cpp

@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <curl/curl.h>
+
+int main() {
+
+    printf("test1\n");
+
+    CURL* curl; CURLcode res;
+    curl = curl_easy_init();
+
+    if (curl) {
+
+        curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/");
+
+        /* Perform the request, res will get the return code */
+        res = curl_easy_perform(curl);
+
+        /* Check for errors */
+        if (res != CURLE_OK) {
+            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
+        }
+
+        /* always cleanup */
+        curl_easy_cleanup(curl);
+    }
+
+    return 0;
+}
+