krb5_copy_authdata
retval = krb5_copy_authdata(context, mcursor->creds->authdata,
retval = krb5_copy_authdata(context, incred->authdata,&tempcred->authdata);
retval = krb5_copy_authdata(context, partfrom->authorization_data,
krb5_error_code KRB5_CALLCONV krb5_copy_authdata
retval = krb5_copy_authdata(context, authfrom->authorization_data,
code = krb5_copy_authdata(context, ad_data, container);