OpenSSL 4.1.0 is a feature release adding significant new functionality to OpenSSL.
Added VC-WIN32-MSVC2013 and VC-WIN64A-MSVC2013 build targets to provide internal functions for bridging the gaps in C99 standard support that are present in MSVC 2013.
Added optimized ML-DSA and ML-KEM NTT operations on ppc64le; optimized ML-DSA operations on x86_64; AVX-512-optimized SHAKE x4 operations for ML-DSA on x86_64; AVX-512 and VAES optimizations for AES-CBC decryption on x86_64.
Changed tsget utility to use Net::Curl::Easy (from the Net-Curl CPAN distribution) instead of the abandoned WWW::Curl::Easy. Users who rely on tsget should install Net::Curl::Easy before upgrading.





