Where to post questions about QDN?

Probably not in this group, since this is for news. But I don’t know
where else “domestic” posts like this should go.

I wanted to ask why there’s a qdn.public.qnxrtp.porting and no
qdn.public.qnx4.porting. Seems kind of asymmetric. There is a
qdn.public.porting, but I believe that’s for both systems (?)