Merge pull request #6310
177a0e4 Adding CSubNet constructor over a single CNetAddr (Jonas Schnelli)
409bccf use CBanEntry as object container for banned nodes (Jonas Schnelli)
dfa174c CAddrDB/CBanDB: change filesize variables from int to uint64_t (Jonas Schnelli)
f581d3d banlist.dat: store banlist on disk (Jonas Schnelli)