[pve-devel] [RFC storage] dir: allow a path as is_mountpoint value

[Dietmar Maurer]

> +    return $path if $is_mp =~ m/^(1|on|yes|true)$/i;
> +    return undef if $is_mp =~ m/^(0|off|no|false)$/i;

Don't we have a parse_boolean() helper somewhere? If not, can we
add one? I would like to avoid multiple definition of what we 
accept for boolean values.