Vendor

This is downloaded from https://github.com/latchset/pkcs11-headers/blob/b131b9e4599db6e0287a3d74f6768e08a0c82d23/public-domain/3.1/pkcs11.h:

```shell
wget https://raw.githubusercontent.com/latchset/pkcs11-headers/0ecf659eaa743472192bf3af2579144c5f8c053f/public-domain/3.1/pkcs11.h
```
