Blacklisting DIMMs doesn't override warning "status of all x dimms is n/a (please upgrade firmware)"

[fredricj]

Currently blacklisting one or more DIMMs doesnt allow you to override the warning telling you to upgrade firmware. The status check in MemorySubsystem.pm doesnt check if a module is blacklisted when counting ok modules.
To ignore this warning you have to add --ignore-dimms but this requires you to either

1. add it to all corresponding nagios checks,
2. split the nagios checks to have one with this option and one without and assign this properly
3. do other server specific things like adding an alias etc

Is this intended or a bug?