Fix Ubuntu 19.10 zfs installer /usr/share/ubiquity/zsys-setup (encryption)

Ubuntu 19.10 zfs installer Encryption

1) Start in uefi mode.

At Line 216 use:

echo password | zpool create -f \
		-o ashift=12 \
		-O compression=lz4 \
		-O acltype=posixacl \
		-O xattr=sa \
		-O relatime=on \
		-O normalization=formD \
		-O mountpoint=/ \
		-O canmount=off \
		-O dnodesize=auto \
		-O sync=disabled \
		-O recordsize=1M \
		-O encryption=aes-256-gcm \
		-O keylocation=prompt \
		-O keyformat=passphrase \
		-O mountpoint=/ -R "${target}" rpool "${partrpool}"