libssh-0.8.8
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/
crytpo: Make sure we check return of ssh_get_random() correctly
Fix config.h includes
external: Add ChaCha and Poly1305 implementations from OpenSSH