Add note about Botan qconf support.
Add note about Botan qconf support.

svn path=/trunk/kdesupport/qca/; revision=366104

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