[Call For Testing] VirtualBox for FreeBSD! take 3

[Henry Hu]

I've tried the virtualbox_4.tgz.
It compiled and installed fine, but the screen keeps gray after I
started the VM.
I tried to debug and found that the VM stops in the wait() call in bios.
After hlt instruction, the timer interrupt never arrives. But if I
press a key, I can see log messages about it.

After I changed kern.hz from 100 to 1000, the problem went away.
There's a problem about VMX when installing Windows XP. I installed it
with VMX disabled and then enabled VMX.
Now I'm running Windows XP smoothly, much faster than qemu. Thanks for
the great work!

Cheers,
Henry