# File lib/phusion_passenger/platform_info/apache.rb, line 282
        def self.httpd_envvars_file(options = nil)
                if options
                        httpd = options[:httpd] || self.httpd(options)
                else
                        httpd = self.httpd
                end

                httpd_dir = File.dirname(httpd)
                if httpd_dir == "/usr/bin" || httpd_dir == "/usr/sbin"
                        if File.exist?("/etc/apache2/envvars")
                                return "/etc/apache2/envvars"
                        elsif File.exist?("/etc/httpd/envvars")
                                return "/etc/httpd/envvars"
                        end
                end

                conf_dir = File.expand_path(File.dirname(httpd) + "/../conf")
                if File.exist?("#{conf_dir}/envvars")
                        return "#{conf_dir}/envvars"
                end

                return nil
        end