doc: Forwarding link. FAQ migrated to new Ceph wiki.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Commented out remove a mds for now.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Commented out osd list for now.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>