Per RFc 6112 use SignedData not ContentInfo for anonymous when the KDC
offers support for PKINIT_KX padata.

https://github.com/krb5/krb5/commit/f79ba7eca6846552fcd00d42f4b8f67e05af2e40
Commit By: hartmans
Revision: 25186
Changed Files:
U   trunk/src/plugins/preauth/pkinit/pkinit.h
U   trunk/src/plugins/preauth/pkinit/pkinit_clnt.c
U   trunk/src/plugins/preauth/pkinit/pkinit_crypto_openssl.c