- f13ff45 HAS services.clightning but only as { plugins = ... }, no enable
-> 'option does not exist, did you mean plugins' (your error)
- Sovran never uses lightningBackend == clightning (uses lnd),
so just don't set services.clightning.enable at all
- Also make lnd port conflict check always true for clightning case
- Fixes both f13ff45 (has clightning/plugins) and 8b8c811 (removed)