General upgrade to the libgcrypt provider: * Complete PBKDF2 support (now working) * Factor out a common versioning check * Initial support for memory plugin, broken for reasons I don't understand
General upgrade to the libgcrypt provider:
* Complete PBKDF2 support (now working)
* Factor out a common versioning check
* Initial support for memory plugin, broken for reasons I don't understand


Azeth/QtCrypto,Azeth/QtCrypto,Azeth/QtCrypto,Azeth/QtCrypto