• fixed channel_forkpty() race condition between close(slave) in parent process and login_tty(slave) in child process
• fixed behavior when using terminal mode and stdin redirected to /dev/null 'ssh -tt -n'
• added an 'strict-key' key exchange kex-strict-s-v00@openssh.com (Mitigates CVE-2023-48795 "Terrapin attack")