Make CURL follow redirects.

Suggested by prcarter.

util.c

@@ -105,6 +105,7 @@ json_t *json_rpc_call(CURL *curl, const char *url,
 	curl_easy_setopt(curl, CURLOPT_READFUNCTION, upload_data_cb);
 	curl_easy_setopt(curl, CURLOPT_READDATA, &upload_data);
 	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_err_str);
+	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 	if (userpass) {
 		curl_easy_setopt(curl, CURLOPT_USERPWD, userpass);
 		curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);