Function gio_sys::g_socket_client_connect_to_uri

pub unsafe extern "C" fn g_socket_client_connect_to_uri(
    client: *mut GSocketClient, 
    uri: *const c_char, 
    default_port: u16, 
    cancellable: *mut GCancellable, 
    error: *mut *mut GError
) -> *mut GSocketConnection