Supports leaving booleans unspecified in YAML.
Boolean methods allow the templates to continue using previous names for
boolean values.
Signed-off-by: Jonathon Anderson <janderson@ciq.com>
The option cow can now be set for files which are then
mounted during exec, but copied into the image and removed
if not modified.
Signed-off-by: Christian Goll <cgoll@suse.com>