Documenting various GEOM_* kernel options

[Benjamin Kaduk]

On Wed, 13 Mar 2013, Joel Dahl wrote:

> On Sat, Mar 09, 2013 at 10:11:23AM +0100, Joel Dahl wrote:
>>
>> I recently noticed we haven't documented all of the various GEOM_* kernel
>> options in any manual pages.
>>
>> Both the gpart(8) and geli(8) manpages have kernel options in the SYNOPSIS,
>> which probably isn't correct for section 8 manpages.
>>
>> What about using the SYNOPSIS in the geom(4) manpage? Opinions?
>
> I have something like the attached patch in mind.

That looses the explicit instructions for loading the module at boot-time, 
but otherwise seems plausible.

-Ben