* Reduce Nim 1.6 compiler warnings/hints for Fluffy and Nimbus proxy
Mostly raises Defect removals, TaintedString removal and some
unnecessary imports.
Also updating the copyright years alongside.
* Further reduce Nim 1.6 compiler warnings/hints for Nimbus
* Fix Portal Hive fails by correcting Portal history JSON RPC API
- Field naming in discv5_nodeInfo
- Call naming of portal_historyStore
- Other: some proc to func adjustements
Kim De Mey
KonradStaniec