replace (Irc::User)

    # File lib/rbot/irc.rb, line 1003
        def replace(other)
          case other
          when User
            self.nick = other.nick
            self.user = other.user
            self.host = other.host
            @server = other.server
            @casemap = other.casemap unless @server
            @away = other.away?
          else
            self.replace(other.to_irc_user(server_and_casemap))
          end
        end