Fix memory leak in X509_REQ
The propq is strdup'ed in X509_REQ_new_ex, but never freed.
@@ -60,6 +60,7 @@ static int req_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
case ASN1_OP_FREE_POST:
ASN1_OCTET_STRING_free(ret->distinguishing_id);
+ OPENSSL_free(ret->propq);
break;
case ASN1_OP_DUP_POST:
{
