Loadable GEOM classes working.

[Poul-Henning Kamp]

I think I have managed to extract my "GEOM+KLD" patch from the
rain-forest which my development trees have grown into.

This will not be committed until after the 5.1-R freeze is over,
but if anybody wants to play with this, send me email.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.