Fix to stop X509_time_adj() using GeneralizedTime.

 Changes between 0.9.6 and 0.9.7  [xx XXX 2000]

  *) Make X509_time_adj() cope with the new behaviour of ASN1_TIME_new().

     Previously it initialised the 'type' argument to V_ASN1_UTCTIME which

     effectively meant GeneralizedTime would never be used. Now it

     is initialised to -1 but X509_time_adj() now has to check the value

     and use ASN1_TIME_set() if the value is not V_ASN1_UTCTIME or

     V_ASN1_GENERALIZEDTIME, without this it always uses GeneralizedTime.

     [Steve Henson, reported by Kenneth R. Robinette

				<support@securenetterm.com>]

  *) Fixes to BN_to_ASN1_INTEGER when bn is zero. This would previously

     result in a zero length in the ASN1_INTEGER structure which was

     not consistent with the structure when d2i_ASN1_INTEGER() was used

ASN1_TIME *X509_time_adj(ASN1_TIME *s, long adj, time_t *in_tm)

	{

	time_t t;

	int type = -1;

	if (in_tm) t = *in_tm;

	else time(&t);

	t+=adj;

	if (!s) return ASN1_TIME_set(s, t);

	if (s->type == V_ASN1_UTCTIME) return ASN1_UTCTIME_set(s,t);

	return ASN1_GENERALIZEDTIME_set(s, t);

	if (s) type = s->type;

	if (type == V_ASN1_UTCTIME) return ASN1_UTCTIME_set(s,t);

	if (type == V_ASN1_GENERALIZEDTIME) return ASN1_GENERALIZEDTIME_set(s, t);

	return ASN1_TIME_set(s, t);

	}

int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain)