This function checks if given certificate is CA certificate (can be used
to sign other certificates).
-=head1 RETURN VALUE
+=head1 RETURN VALUES
Function return 0, if it is not CA certificate, 1 if it is proper X509v3
CA certificate with B<basicConstraints> extension CA:TRUE,
=head1 COPYRIGHT
-Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2015-2017 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy