[PATCH] Add a VirtualBox section to Handbook's 'Virtualization' chapter

[Manolis Kiagias]

Daichi GOTO wrote:
> Great work! thanks,
> and I have a little suggestion. How about to revert the paragraphs?
>
>    VirtualBox is an actively developed, ....
>
>    For a number of years, FreeBSD was not officially supported as....
>
> How does that sound?
>

Thanks!

I feel that since the heading is "FreeBSD as a Host OS" it would be
better to start the discussion with a general intro rather than getting
to VirtualBox specifics right away.