consensus weight case 2b3 does not follow dir-spec
dir-spec says the following.
If M > T/3, then the Wmd weight above will become negative. Set it to 0 in this case: Wmd = 0 Wgd = weight_scale - Wed
The code dutifully sets
Wmd to 0, but neglects
I assume the spec is correct and the intended behavior. Branch incoming once I get a ticket number.