add manual addresses list

local node can enable wallet services to addresses without
alternative currencies

just add general/manual_addresses.json with the format:
[[{"address":"1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T"}, {"address":"1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa"}]]