Upgrade all hosts to release2105 NixOS
That was easier than I expected.
- Fixes privatestorageops#362
- Enables privatestorageops#361
- Fixes privatestorageops#279, #42 (closed)
- Enables privatestorageops#275, #41 (closed)
- Refers privatestorageops#218
Edited by Florian Sesser