<whack><whack>

Cut the System Administration chapter roughly in half. Create a new
chapter: Disks, Filesystems, and Boot Loaders.

Put new chapter in rough order:

*new hard disks
*UFS tricks
*foreign filesystems
*foreign loaders
*removeable disks
*misc

This makes the monstrous System Administration chapter short enough to
be almost usable.

Discussed by: -doc