Replacing nodes in subnet qdvhd

[sat]

related:

Subnet Management - General Discussion

Heads up: as a part of post-48 months offboarding of some DCs (and node providers), I will submit some number of proposals. These are DCs that are anyway rarely being picked by the DRE tooling since they do not contribute a lot to the network decentralization, so IMHO this is a positive change. Hopefully some other NPs will pick up the offboarded nodes and continue operating them from another country (although that needs to be discussed elsewhere).