This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
in order to create sparse directory files that caused a panic of a
filesystem where fsck would not find anything. A fix for fsck is in the
make but still has to be reviewed by Kirk McKusick.
