The ReadOnly and the RunInit keys affect options that have a variable
default (configurable in containers.conf). This means we need to
handle them a bit differently in quadlet to allow overriding the
default. For example, we can't assume ReadOnly=false doesn't need to
add any argument because no argument may mean readonly=true if the default
is changed.
We now don't add any argument (leaving the default) if the key is not specified,
or we always add an argument (--foo or --foo=false) if the key is specified (overriding whatever the default is).
Signed-off-by: Alexander Larsson <alexl@redhat.com>
This makees much more sense for typical service loads, and can
easily be reverted by `ReadOnly=no`.
Also updates and adds various tests for this.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
