Remove "Valid options" label, since all commands have sections (and
[almost] always the first one is "General options").
Have "list --options" ignore section headers
Reformat ts's additional help

Add output section
Reviewed-by: NTomas Mraz <tmraz@fedoraproject.org>
Reviewed-by: NPaul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9953)