# File lib/new_relic/agent/configuration/yaml_source.rb, line 133
        def booleanify_values(config, *keys)
          # auto means defer ro default
          keys.each do |option|
            if config[option] == 'auto'
              config.delete(option)
            elsif !config[option].nil? && !is_boolean?(config[option])
              config[option] = !!(config[option] =~ /yes|on|true/i)
            end
          end
        end