Documenting various GEOM_* kernel options

[Joel Dahl]

Hi,

I recently noticed we haven't documented all of the various GEOM_* kernel
options in any manual pages. I don't know if this is intentional or not. A
quick grep reveals the following ("-" means not documented anywhere):

GEOM_AES		-
GEOM_BDE		Documented in gbde(4) manpage
GEOM_BSD		-
GEOM_CACHE		-
GEOM_CONCAT		-
GEOM_ELI		Documented in geli(8) manpage
GEOM_FOX		Documented in geom_fox(4) manpage
GEOM_GATE		Mentioned in hastd(8)
GEOM_JOURNAL		-
GEOM_LABEL		-
GEOM_LINUX_LVM		Documented in geom_linux_lvm(4) manpage
GEOM_MBR		-
GEOM_MIRROR		-
GEOM_MULTIPATH		-
GEOM_NOP		-
GEOM_PART_APM		Documented in gpart(8) manpage
GEOM_PART_BSD		Documented in gpart(8) manpage
GEOM_PART_EBR		Documented in gpart(8) manpage
GEOM_PART_EBR_COMPAT	Documented in gpart(8) manpage
GEOM_PART_GPT		Documented in gpart(8) manpage
GEOM_PART_LDM		Documented in gpart(8) manpage
GEOM_PART_MBR		Documented in gpart(8) manpage
GEOM_PART_PC98		Documented in gpart(8) manpage
GEOM_PART_VTOC8		Documented in gpart(8) manpage
GEOM_PC98		-
GEOM_RAID		-
GEOM_RAID3		-	
GEOM_SHSEC		-
GEOM_STRIPE		-
GEOM_SUNLABEL		-	
GEOM_UZIP		Documented in geom_uzip(4) manpage
GEOM_VIRSTOR		-
GEOM_VOL		-
GEOM_ZERO		-

Both the gpart(8) and geli(8) manpages have kernel options in the SYNOPSIS,
which probably isn't correct for section 8 manpages.

Some options are already documented in section 4 manpages (GEOM_BDE, GEOM_FOX,
GEOM_LINUX_LVM and GEOM_UZIP) but what do we do with the rest? What about
using the SYNOPSIS in the geom(4) manpage? Opinions?

-- 
Joel