if mounted with an idle time, encfs should unmount on suspend/resume

If encfs is used to mount a filesystem with an idle timeout, then the computer is suspended and resumed much later, the filesystem should be automatically unmounted. One could argue that it should only be automatically unmounted if more than the timeout has passed since the mount, maybe a flag to control which of these happens would be best.

A typical laptop user though would probably want encfs to automatically unmount everything encrypted on resume.