Current implementation of arguments is hacked to support multiple
programs that shares same options. Now it also handles help and syslog
options. We can chose which option applies to which program using bits
in dedicated variable.

Updater CLI arguments: help option exits with 0

We should distinguish between truly wrong argument and just usage of
--help|-h option. It should exit with nonzero exit code only when
something went wrong and not every time we print help.