Update list of supported smartcards
Especially make it explicit that OpenPGP v3 cards are supported.
I noticed while looking at Netkey V15 (that signature card) support that we actually didn't have Netkey v2 in the whitelist for supported cards anymore since at least gpg4win 3.0. So I've updated this list accordingly.
As I don't think you can get Netkey v2 cards since a very long time Idoub't thats a problem and we got no complaints. I also don't have a v2 test card available.