Validate() method now returns boolean true or false as validation result.
Validate() method now returns boolean true or false as validation
result.

Signed-off-by: Michael 'Tekkla' Zorn <50f195679bf77bf0955b9c2832e55e1d0c47d29c@tekkla.de>
tekkla/TekFW,tekkla/TekFW