OpenSSL 4.1.0-beta2

OpenSSL release feed covering OpenSSL 4.1.0 beta/alpha feature previews and security patch releases for the 4.0, 3.6, 3.5, and 3.4 branches. The security updates address high-severity issues including DTLS handshake retransmission flaws, X.509 use-after-free, excessive memory allocation, multiple QUIC denial-of-service conditions, elliptic-curve timing leaks, SM2 non-constant-time operations, and an out-of-bounds access during handshakes. OpenSSL 4.1.0 adds DTLS 1.3, GREASE, DTLS listener support, IKEv2 KDF, post-quantum cryptographic optimizations, and other compatibility changes.