GELI <3

Instructions:

* use at your own risk
* clone, make iso SE=1
* zfsinstall -d your_test_disk -t /cdrom/9.1-RELEASE-amd64.tar.xz -b 300M -E

If you use `-E` without `-b 300M` you will not have a bootable system.
`-E` by itself is only good if you boot from a custom mfsbsd and unlock, chroot, rc...

Thank you for your initial contribution