separate FLAGS out in -h

Help output is quite crowded already with every command
being prefixed by --debug and --json options, and we're
about to add a third one.

Add an indirection.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
1 file changed