* fhandler_registry.cc (must_encode): New function.

	* fhandler_registry.cc (must_encode): New function.
	(encode_regname): Ditto.
	(decode_regname): Ditto.
	(fhandler_registry::exists): Encode name before path compare.
	(fhandler_registry::fstat): Pass decoded name to win32 registry call.
	(fhandler_registry::readdir): Return encoded name to user.
	(fhandler_registry::open): Store decoded name into value_name.
	(open_key): Pass decoded name to win32 registry call.