Add umount as an alias for unmount #4
Description
I used to work as a Solaris kernel developer, and really miss having the beadm command on Linux - finding this project is a delight.
One thing that caused friction for me is that I've got ~30y of muscle memory typing umount rather than unmount, and Solaris' beadm command supports both beadm unmount and beadm umount.
It would be very nice if this project could support that alias as well.