Commit
9f50fd3fadc7f8ba22fc91e3f2a6519d79f8d37b
by blucacrypttab: append x-initrd.attach option
This ensure that systemd closes the device at the end of the
shutdown process, to avoid races with mounted filesystems.
https://www.freedesktop.org/software/systemd/man/latest/crypttab.html#x-initrd.attach
Closes: #1017542