doc: vos manpage fixes

 - Add missing -config option to 'common' vos options, and to the
   synopsis for all commands

 - Remove brackets in the options descriptions for vos_shadow,
   vos_create, and vos_clone. We don't do this in other manpages.

 - vos_create: Add missing -id, -roid to synopsis

 - vos_clone: Add missing -readwrite option

 - vos_shadow: Add missing -toid option

Change-Id: I41fd56509e78116698c82a2f3f4fd07f26cdc95f
Reviewed-on: http://gerrit.openafs.org/10397
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
doc: Make all vos pages =include common options

Many manpages for "vos" subcommands were not using the "common" vos
fragments, and instead were just repeating the information directly in
their manpage. Make them all use the "common" vos fragment to avoid
duplication.

Change-Id: I62d84a1164b4ba46082e33a6d27fd24e3722014c
Reviewed-on: http://gerrit.openafs.org/10398
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>