    # File lib/phusion_passenger/platform_info/apache.rb, line 67
            def self.httpd
                    if env_defined?('HTTPD')
                            return ENV['HTTPD']
                    elsif apxs2.nil?
                            ["apache2", "httpd2", "apache", "httpd"].each do |name|
                                    command = find_command(name)
                                    if !command.nil?
                                            return command
                                    end
                            end
                            return nil
                    else
                            return find_apache2_executable(`#{apxs2} -q TARGET`.strip)
                    end
            end