Mount sysfs when /sys/kernel/security/ does not exist rather than when /sys/kernel/ does not exist, for some distributions have /sys/kernel/debug/ on root device.
Wait for /etc/tomoyo/tomoyo-post-init in a more reliable way.
/usr/sbin/tomoyo-diffpolicy
Fix regression introduced when fixing old/new inversion bug.
* Version 2.3.0p2 2011/05/11 Minor update release.