312f353b98
gss_store_cred_into*() will now switch the new cred cache to be the primary/default cred cache when - the caller requested it and, - if the caller passed in a user name, the creds' principal is the best principal for the named user. A principal is the best principal for a user when the principal has just one component, the component is the user's username, and the realm is the configured user_realm.