NB: the variable 'directory' specifies that the image should be
mounted, when initrd-bootchain feature using.

This reverts commits:
1c38381c
3d411fe1

See: https://bugzilla.altlinux.org/show_bug.cgi?id=37201#c35

Hide messages of little significance by default. Now for rescue.
See commit 3d411fe1

Hide messages of little significance by default.
See: https://bugzilla.altlinux.org/37201

Can be useful for iso without stage2 (net-install).
grub can bootload by uuid.

For use them separately.