Add in support for checking usage when validating keys.
Add in support for checking usage when validating keys.

CCMAIL: justin-psi2@affinix.com

svn path=/trunk/kdesupport/qca/; revision=409986

karolherbst/qca,JoshuaKolden/qca,highfidelity/qca,JoshuaKolden/qca,KDE/qca,highfidelity/qca,karolherbst/qca,KDE/qca,sladage/qca,Bjoe/qca,Esf-Software/qca,highfidelity/qca,Bjoe/qca,Bjoe/qca,karolherbst/qca,sladage/qca,sladage/qca,KDE/qca,KDE/qca,sladage/qca,karolherbst/qca,Esf-Software/qca,Esf-Software/qca,oktavarium/qca,Esf-Software/qca,oktavarium/qca,JoshuaKolden/qca,Bjoe/qca,highfidelity/qca,oktavarium/qca,JoshuaKolden/qca,oktavarium/qca