ismounted.c (check_mntent_file): We now validate the entry in

ismounted.c (check_mntent_file): We now validate the entry in
	/etc/mtab to make sure the filesystem is really mounted,
	since some broken distributions (read: Slackware) have
	buggy boot scripts that don't initialize /etc/mtab before
	checking non-root filesystems.  (Slackware also doesn't
	check the root filesystem separately, and reboot if the
	root filesystem had changes applied to it, which is
	dangerous and broken.)