Option --help should provide a brief information, like a list of
commands and options and their meaning, ideally no more than 1 line per
option. There is no need to describe nuances and details here, since
we have documentation (wiki and  man pages) for that.

travis-ci: success for Document --weak-syscalls
Cc: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Acked-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>