An array of krb5_authdata structures.
The last element must be NULL.
outauthdat (output)
A copy of the array of
krb5_authdata structures.
Description This routine copies an authdata structure,
filling in *outauthdat to point to the
newly allocated copy, which should be freed with krb5_free_authdata.
Return
Values This routine returns the following KRB5 status code: