A new tab on the certificate details dialog
shows the result of the OpenSSL validation process
and the calculated OpenSSL Purpose.
The translation of the OpenSSL X509_V_ERR.... messsages
back to strings is done by grepping them from "openssl/x509_vfy.h"
and wrapping them into a macro-call.
Additionally guard them by an #ifdef (Zombieland rule #2: Double-Tap)
This way:
- I don't need to test and check in which versions of OpenSSL
which errors are available or not
- New errors will be picked up automatically, as long as they
match the "X509_V_ERR_" pattern
