use_proxy
info->use_proxy = proxy_host != NULL;
int use_proxy;
if ((info->use_proxy
info.use_proxy = /* workaround for callback design flaw, see #17088 */
info.use_proxy = /* workaround for callback design flaw, see #17088 */
if (proxy == NULL || *proxy == '\0' || !use_proxy(no_proxy, server))
bool use_proxy)
conn->conn_use_proxy = use_proxy;
const struct connection_ops *ops, bool use_proxy);