[libvirt] [v3] virsh: Categorize commands into groups for virsh help

[Osier Yang]

carelessly removed "-V | --version=long", updated patch is following

- Osier
于 2010年11月30日 14:16, Osier Yang 写道:
> Change the virsh help out. The new output of "virsh help" and
> "virsh --help" will be like:
>
>   Secret (help keyword 'secret'):
>      secret-define                  define or modify a secret from an XML file
>      secret-dumpxml                 secret attributes in XML
>      secret-set-value               set a secret value
>      secret-get-value               Output a secret value
>      secret-undefine                undefine a secret
>      secret-list                    list secrets
>
>   Snapshot (help keyword 'snapshot'):
>      snapshot-create                Create a snapshot
>      snapshot-current               Get the current snapshot
>      snapshot-delete                Delete a domain snapshot