Log Message:
Updated to 0.5.3, provided by Min Sik Kim PR pkg/23322.

Changes:

* Added a compile time check for vasprintf.
* The unsigned long types were changed to unsigned int.
* Internal message digest and symmetric crypto library to simplify to
  include parts of OpenCDK into an own application.
* Huge interface and naming changes to enhance the readability of the
  code. Several code cleanups which means some functions are not
  public any longer. No backward compatibility to force client
  applications to change the interface as soon as possible.
* Simplified API for listing keys.
* Extended key node (KBNODE) API to extract attributes more easier.
* Signature sub packet API is now public.
* Read-only support for revocation keys.
* Bug fix to prevent possible DOS memory attack.
* Support for literal partial body packets.

And more...