libssh-0.9.4
src: Use explicit_bzero() if available on the platform
cleanup: use ssh_ prefix in the blf (non-static) functions
chacha: remove re-declared type
Move all 3rd-party C files to src/external/
ed25519: Replace unsigned long long with uint64_t
fe25519: Fix integer types of fe25519_iszero()
Fix config.h includes
external: Add ChaCha and Poly1305 implementations from OpenSSH
sc25519: Fix integer types of sc25519_add()