AGS_DEMAND_CONFIGURATION_COMMAND, _STATUS duplication discovered.

It has been discovered that a pair of DGNs have been duplicated.

Martin Perlot submits the following language for sections 6.36.7 and 6.36.8.

Due to an oversight, the same DGN was defined twice, as GENERATOR_DEMAND_CONFIGURATION_COMMAND and AGS_DEMAND_CONFIGURATION_STATUS. The AGS_DEMAND_CONFIGURATION_ COMMAND (1FED4h) is preferred going forward, but devices implementing this message should support both to prevent incompatibilities with legacy products.

Due to an oversight, the same DGN was defined twice, as GENERATOR_DEMAND_CONFIGURATION_STATUS and AGS_DEMAND_CONFIGURATION_STATUS. The AGS_DEMAND_CONFIGURATION_STATUS (1FED5h) is preferred going forward, but devices implementing this message should support both to prevent incompatibilities with legacy products.