x509asn1.c,x509asn1.h: new module to support ASN.1/X509 parsing & info extract

Use from qssl backend

lib/url.c

@@ -1900,6 +1900,8 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
      */
     data->set.ssl.fsslctxp = va_arg(param, void *);
     break;
+#endif
+#if defined(USE_SSLEAY) || defined(USE_QSOSSL)
   case CURLOPT_CERTINFO:
     data->set.ssl.certinfo = (0 != va_arg(param, long))?TRUE:FALSE;
     break;