parse_resolv_conf

# File lib/resolv.rb, line 925
      def Config.parse_resolv_conf(filename)
        nameserver = []
        search = nil
        ndots = 1
        open(filename, 'rb') {|f|
          f.each {|line|
            line.sub!(/[#;].*/, '')
            keyword, *args = line.split(/\s+/)
            args.each { |arg|
              arg.untaint
            }
            next unless keyword
            case keyword
            when 'nameserver'
              nameserver += args
            when 'domain'
              next if args.empty?
              search = [args[0]]
            when 'search'
              next if args.empty?
              search = args
            when 'options'
              args.each {|arg|
                case arg
                when /\Andots:(\d+)\z/
                  ndots = $1.to_i
                end
              }
            end
          }
        }
        return { :nameserver => nameserver, :search => search, :ndots => ndots }
      end