• On OpenVMS, detect vendor SSL111 product based on OpenSSL 1.1.x.
  
• Cast the return value of OCSP_SINGLERESP_get0_id to fix a
  const/non-const mismatch warning that broke the build on OpenVMS.
  
• Create SSL_CTXs with Test::Net::SSLeay's new_ctx() function for tests that
  are broken with LibreSSL 3.2. Partially fixes GH-232.
  
• In 36_verify.t, account for the presence of the X509_V_FLAG_LEGACY_VERIFY
  flag (signalling the use of the legacy X.509 verifier) in LibreSSL 3.2
  versions from 3.2.4 onwards. Fixes the remainder of GH-232.
  
• Note in the Net::SSLeay documentation that the TLS 1.3 implementation in
  LibreSSL 3.1 - 3.3, parts of which are enabled by default, is not
  libssl-compatible. See the "KNOWN BUGS AND CAVEATS" section of
  lib/Net/SSLeay.pod for details.
  
• Add constants for, but not limited to,
  SSL_CTX_set_msg_callback and SSL_set_msg_callback functions:
  SSL3RT* for record content types, SSL3MT* for Handshake
  and ChangeCipherSpec message types, SSL2_VERSION to
  complement the list of existing SSL and TLS version
  constants and SSL2MT* for SSLv2 Handshake messages.
  
• Expose SSL_CTX_set_keylog_callback and
  SSL_CTX_get_keylog_callback available with OpenSSL 1.1.1pre1
  and later.
  
• Enhance 10_rand.t RAND_file_name tests: tests are no longer
  affected by the runtime environment variables, HOME and
  RANDFILE. These variables are insted controlled by the tests
  with local %ENV. Problems related to RAND_file_name were
  discussed in Github issue GH-152, and there might still be
  cases when, for example, setuid is used because of OpenSSL's
  use of glibc secure_getenv() and related functions. Address
  RAND_file_name differences between OpenSSL versions. Note in
  SSLeay.pod that RAND_file_name() can return undef with
  LibreSSL and recent OpenSSL versions.
  
• Removed the following exportable symbols from SSLeay.pm:
  
  • SESSION, clear_error and err have never been defined.
    
  • add_session, flush_sessions and remove_session were
    removed in Net::SSLeay 1.04
    
  • Undocumented X509_STORE_CTX_set_flags() was removed in
    Net::SSLeay 1.37 when X509_VERIFYPARAM* functions were
    added. These are preferred over directly setting the flags.
    
• Clarified Changes entry for release 1.75 to state that
  CTX_v2_new is not removed from Net::SSLeay. SSLv2 is
  completely removed in OpenSSL 1.1.0.
  
• Beginning with OpenSSL 3.0.0-alpha17, SSL_CTX_get_options()
  and related functions return uint64_t instead of long. For
  this reason constant() in constant.c and Net::SSLeay must
  also be able to return 64bit constants. Add uint64_t
  definitions to typemap file and update constant() and
  options functions to use uint64_t with OpenSSL 3.0.0 and
  later when Perl is compiled with 64bit integers. With 32bit
  integers, the functions remain as they are: constant()
  functions return double and options functions return
  long. This partially fixes GH-315, 32bit integer Perls need
  to be handled separately.
  
• Work around macOS Monterey build failure during 'perl
  Makefile.PL' that causes perl to exit with 'WARNING:
  .../perl is loading libcrypto in an unsafe way' or similar
  message. This fixes GH-329. Thanks to Daniel J. Luke for the
  report and John Napiorkowski for additional help.