* fhandler_disk_file.cc (readdir_check_reparse_point): Rename from

	* fhandler_disk_file.cc (readdir_check_reparse_point): Rename from
	is_volume_mountpoint.  Return valid d_type value for underlying
	reparse point type.
	(readdir_get_ino): Don't rely on the handle set in pc.check.  Open
	file here if pc.handle() is NULL.
	(fhandler_disk_file::readdir_helper): Try to set a correct d_type value
	more diligent.
	(fhandler_disk_file::readdir): Don't reset dirent_set_d_ino unless
	we're really sure it's due to an untrusted FS.  Simplify usage of
	FileAttributes, which is 0 if buf is NULL, anyway.  Set d_type
	correctly for faked "." and ".." entries.  Improve debug output.
	* path.cc (symlink_info::check): Don't keep handle to volume mount
	point open.  Explain why.