    # File lib/rbot/core/config.rb, line 123
      def handle_add(m, params)
        key = params[:key].to_s.intern
        value = params[:value]
        unless @bot.config.items.has_key?(key)
          m.reply _("no such config key %{key}") % {:key => key}
          return
        end
        unless @bot.config.items[key].kind_of?(Config::ArrayValue)
          m.reply _("config key %{key} is not an array") % {:key => key}
          return
        end
        return if !@bot.auth.allow?(@bot.config.items[key].auth_path, m.source, m.replyto)
        begin
          @bot.config.items[key].add(value)
        rescue ArgumentError => e
          m.reply _("failed to add %{value} to %{key}: %{error}") % {:value => value, :key => key, :error => e.message}
          return
        end
        handle_get(m,{:key => key})
        m.reply _("this config change will take effect on the next restart") if @bot.config.items[key].requires_restart
        m.reply _("this config change will take effect on the next rescan") if @bot.config.items[key].requires_rescan
      end