Not wanting to support it is a strange argument for not documenting it. I am not surprised that they're not documenting it, but not for this reason. Their clie

Not wanting to support it is a strange argument for not documenting it. I am not surprised that they're not documenting it, but not for this reason. Their client — the Unites States Government — demanded this feature be made specifically for their internal use, so I would hope it is a pretty well supported configuration already. Furthermore as it only seems to be disabling features rather than enabling new ones, there should be little support needed in the first place. Anyone with the knowledge and equipment to go enable the HAP bit is unlikely to need any more support than the documentation itself.