# File lib/phusion_passenger/platform_info/apache.rb, line 151
        def self.httpd_default_root(options = nil)
                if options
                        info = httpd_V(options)
                else
                        info = httpd_V
                end
                if info
                        info =~ / -D HTTPD_ROOT="(.+)"$/
                        return $1
                else
                        return nil
                end
        end