do you guys know if OE 11.6 (or above) database clustering on Windows 2012/R2 is supported or planned?

Coz the last time I checked, Windows 2008 R2 was the max you could go for, and new clients getting new servers tend to ask about newer OS.

Also, is there a specific/additional license needed for clustering, we're talking about Active/Passive setup since at a single point in time, only one node can handle the database, the other is just sitting on the bench.