# File lib/rbot/irc.rb, line 748
    def replace(other)
      case other
      when Netmask
        nick = other.nick
        user = other.user
        host = other.host
        @server = other.server
        @casemap = other.casemap unless @server
      else
        replace(other.to_irc_netmask(server_and_casemap))
      end
    end