Function safe_app::ffi::app_reconnect

#[no_mangle]
pub unsafe extern "C" fn app_reconnect(
    app: *mut App, 
    user_data: *mut c_void, 
    o_cb: extern "C" fn(_: *mut c_void, _: FfiResult)
)

Try to restore a failed connection with the network.

Callback parameters: user data, error code