case "illumos", "solaris":
		return []string{"LD_LIBRARY_PATH", "LD_LIBRARY_PATH_32", "LD_LIBRARY_PATH_64"}
	case "windows":
		return []string{"SystemRoot", "COMSPEC", "PATHEXT", "WINDIR"}
	}
	return nil
}()

// Handler runs an executable in a subprocess with a CGI environment.
type Handler struct {
	Path string // path to the CGI executable

			env = append(env, key+"="+val)
		}
	}

	return env, nil
}

var extraEnvKeys = []string{
	"SYSTEMROOT",         // must be preserved on Windows to find DLLs; golang.org/issue/25210
	"WINDIR",             // must be preserved on Windows to be able to run PowerShell command; golang.org/issue/30711
	"LD_LIBRARY_PATH",    // must be preserved on Unix systems to find shared libraries