Don
One of the signalling molecule jobs of beta hydroxy butyrate is its function as an HDAC1 inhibitor. Perhaps it is that function or one of its other protean functions that seems to reduce craving in addictions.  There are a small group of clinicians using this approach to address your issue. 
As an aside; some keto adapted people note that alcohol is a bad mix with a high fat diet.. From my experience negative day after effects from exuberant ethanol ingestion are substantially mitigated. I am not sure it is a good thing that I can drink and not feel bad the next day, but that is the way it is. 
I expect it is because alcohol is detoxified to acetyl co A the same unit of energy currency that is traded in fat metabolism. Or it might be that in the ketotic state there is a lot less intracellular oxidative stress as evidenced by the profound reduction in inflammatory  markers. And the acetaldehyde present after ethanol ingestion has inflammatory effects.