A variety of kernel configuration updates for 5.0, largely in the
form of <note></note> entries. We now keep kernels in different
places. We changed a bunch of options. We deprecated support
for the i386 processor in GENERIC. We now have PSEUDOFS. We
dropped MFS for mdmfs. We have ACLs in GENERIC. We have ACLs
at all. We have COMPAT_FREEBSD4. Many things that should not have
been options have now been forgotten. No, wait. They were enabled
by default.

<note>We really need two separate documents here: kernel configuration
for FreeBSD 4.x, and kernel configuration for FreeBSD 5.x. This
quantity of notes is a lot less readable than I'd like. If someone
wants to pick up this task before RC2, that would be great.</note>