It is somewhat hard to fully describe --cpu-cap in --help output,
but let's at least say that:
 - option is used to either write or check capabilities;
 - the argument is a comma-separated list;
 - empty argument means "all".

Also, while saying it, contain ourselves within 80 columns of output.

The last item requires more work of course. I'm not sure about others,
but I often work in terminals which are 80 columns wide, and non-wrapped
output looks pretty ugly. I mean, we surely can be better than 'adp'.
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>