Log Message:
Changes 17.0.0:
- Added ``OpenSSL.X509Store.set_time()`` to set a custom verification time when \ 
verifying certificate chains.
- Added a collection of functions for working with OCSP stapling.
  None of these functions make it possible to validate OCSP assertions, only to \ 
staple them into the handshake and to retrieve the stapled assertion if \ 
provided.
  Users will need to write their own code to handle OCSP assertions.
  We specifically added: ``Context.set_ocsp_server_callback``, \ 
``Context.set_ocsp_client_callback``, and ``Connection.request_ocsp``.
- Changed the ``SSL`` module's memory allocation policy to avoid zeroing memory \ 
it allocates when unnecessary.
  This reduces CPU usage and memory allocation time by an amount proportional to \ 
the size of the allocation.
  For applications that process a lot of TLS data or that use very lage \ 
allocations this can provide considerable performance improvements.
- Automatically set ``SSL_CTX_set_ecdh_auto()`` on ``OpenSSL.SSL.Context``.
- Fix empty exceptions from ``OpenSSL.crypto.load_privatekey()``.