pkitool lacks expected option "--help"

pkitool lacks expected option "--help"

The pkitool script lacks the "--help" parameter to actually display the
usage statement; most people are conditioned to try that before running the
command without options. This patch adds that and "--version" to display
just the program name and version.

sf.net tracker:
<https://sourceforge.net/tracker/?func=detail&atid=454721&aid=1705407&group_id=48978>

Signed-off-by: David Sommerseth <dazo@users.sourceforge.net>
Acked-by: Jan Just Keijser <janjust@nikhef.nl>